Malicious PDF — malware analysis report

Static analysis result for SHA-256 5745fe68b47c3495…

MALICIOUS

PDF

69.1 KB Created: 2020-08-06 02:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 658bb641259e2292b7f8b10340660f08 SHA-1: 2c7e62b7e7af4d90f29b060b0cc74e330763fcdb SHA-256: 5745fe68b47c3495062f8b23be5dfe7730204f660929568dd8b65e24d9c79623
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to `https://ttraff.ru/pify?keyword=cambridge+dictionary+pdf+free+download`. This URL is part of a link farm designed to manipulate search engine results and likely leads to a malicious payload. The document body also contains a call-to-action phrase, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=cambridge+dictionary+pdf+free+download In PDF document text
    • http://files.aaadentalbahamas.com/uploads/1/3/1/3/131384340/b484aac553bf5.pdfIn PDF document text
    • http://gomoka.smallenginerepairgalvestoncounty-santafe.com/uploads/1/3/1/3/131379833/kavefika_pobepatix_kisur.pdfIn PDF document text
    • http://votezu.kenaigold.com/uploads/1/3/1/0/131071243/6b48905fce.pdfIn PDF document text
    • http://files.electricslidinggates.co.uk/uploads/1/3/2/6/132682282/2558304.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/46637404781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/network_topology_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/46775200276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/klr650_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6292/7263/files/20943538787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/twisted_brush_open_studio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2760/3354/files/operational_organic_chemistry_lehman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/pageluloreka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/83413053173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/dokekunasife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/41901987332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/geck_fallout_new_vegas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8918/9272/files/mabater.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/chuck_mangione_feels_so_good.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/vozofavujukewitu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6222 15536 bytes
SHA-256: 8d45aaff38f04f82c2c6b02adbd2a07bee3edb0c610835822644d70e7ab802e8
font_01_sfnt_off000094c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C0 5536 bytes
SHA-256: b4025e1c11545533daa9638cf79d5ad3cf1c76d565f924429a6360ac50ca744d
font_02_sfnt_off0000a784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA784 9080 bytes
SHA-256: fbf7c768830fa4b35a845b759759da5b9d952bcefd8cd8bf3beb4d23034c7574
font_03_sfnt_off0000c123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC123 11100 bytes
SHA-256: fa37327c01189713d38fb8a39cc68b0111d6f3e220fe9496c584f0908844bc6a
font_04_sfnt_off0000e680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE680 19264 bytes
SHA-256: 1056ef4fff9ce1725c56bcf8466cf92e3b959fd2af8b8a37868b13bf287c59f5