Malicious PDF — malware analysis report

Static analysis result for SHA-256 de47a2bfb6f711a8…

MALICIOUS

PDF

52.6 KB Created: 2020-08-05 14:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7e5912d8947a54978d1bc79910aa977d SHA-1: b0224e468f8a97fc84882fce6343a327f6ce93ee SHA-256: de47a2bfb6f711a8abeee678bb89e0e2c2d0627ef5851a811e67165f974d58da
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one heuristic specifically flagging a link to a known malicious redirector infrastructure (ttraff.cc). Another heuristic indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or to distribute malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic.

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.cc/pify?keyword=font+awesome+icons+download+pdf In PDF document text
    • http://files.fernandojimenezphoto.com/uploads/1/3/1/6/131637108/lepemusisariraw.pdfIn PDF document text
    • http://files.jerichotownlibraryvt.org/uploads/1/3/1/4/131454501/ec79f8.pdfIn PDF document text
    • http://files.helenhenryraro.com/uploads/1/3/1/4/131482975/014394e7de5.pdfIn PDF document text
    • http://memiwowo.drewkallio.com/uploads/1/3/2/6/132681026/fd6182.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/liquid_rocket_engine_combustion_instability.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/passe_compose_etre_avoir_exercices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/95023460206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/18757159375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16994954809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/kabary_betsimisaraka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1818/9980/files/xuwitotiberi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9975/4397/files/define_probability_sampling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7070/9150/files/dabasosokizuwur.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AC 5040 bytes
SHA-256: 0b834439d5d7b2738bc77fa4e44f3acabdec406e4c185451473c50aa40929210
font_01_sfnt_off000093d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D4 10352 bytes
SHA-256: a540d03cc1c8402c495f0430e9972a12b6f4f52cb368cca7f8e593272c2cd39e
font_02_sfnt_off0000b74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB74F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176