Malicious PDF — malware analysis report

Static analysis result for SHA-256 2051c686d46f8f1e…

MALICIOUS

PDF

40.7 KB Created: 2020-08-09 20:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e64854b408dbdb27aed071bcbcd42b32 SHA-1: 2adb3c8c6d8dfa1330564bea9df77b4918ce6086 SHA-256: 2051c686d46f8f1ed0ace3c2b979b878ec6f63ceea9b4c02996c50ef680115d0
202 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a link farm hosted on Shopify, designed to improve search engine rankings. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body also contains a call-to-action phrase, reinforcing the lure to download something. No scripts were extracted from this sample.

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=download+software+pdf+to+word+untuk+pc In PDF document text
    • http://zurowajo.vitriol3d.com/uploads/1/3/0/8/130814328/43b92586.pdfIn PDF document text
    • http://files.sydneyruby.com/uploads/1/3/0/7/130739264/b21f78c03.pdfIn PDF document text
    • http://files.thefilamentstudio.com/uploads/1/3/1/6/131606035/fakesijerisaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/brain_tumor_detection_using_image_processing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8865/7051/files/bopemupukusazajorod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1801/8216/files/besub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zizamazigunonafimav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4460/8920/files/3850575199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/19635247753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/arterial_blood_gases_made_easy_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3951/5039/files/differentiation_of_algebraic_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/pubizepotolofapekaxeru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1256/1819/files/kijarejireledela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/case_study_method_in_sociology.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6118 5304 bytes
SHA-256: 41888422d80dc974dd0be1358dc557ad06cb8ede3c5bea30c90a9482d4fe1c94
font_01_sfnt_off00007354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 10168 bytes
SHA-256: cd0e2e9f17da4c3ef74a4eb8540c86fc5518ef25912dc4362864b6804b7d6ffc

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