Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39de2f1d4945003…

MALICIOUS

PDF

38.4 KB Created: 2020-08-10 17:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a55b4c61788cdf42f68ffc7423980729 SHA-1: 27060c70454ca31aaa71f2a36d1137f45e41b542 SHA-256: c39de2f1d49450032024e832d2726e8769dde05f71db659396b1ea05fee11614
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=28+creencias+de+los+adventistas+para+ni%25C3%25B1os+pdf'. This URL is likely used to redirect users to malicious content. The document body, though heavily corrupted, also contains this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic to distribute the malicious PDF. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=28+creencias+de+los+adventistas+para+ni%25C3%25B1os+pdf In PDF document text
    • http://files.allanenv.ca/uploads/1/3/0/7/130775503/86044.pdfIn PDF document text
    • http://files.skipaheaddressage.com/uploads/1/3/1/4/131408245/towomikamorojeponij.pdfIn PDF document text
    • http://files.drenzidesigns.com/uploads/1/3/1/0/131070317/8478a359ad.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/1/0434/5374/3270/files/456684938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0504/8994/files/bowflex_revolution_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/fubafajugulebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/wozozixuwipadenoguji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5859/2921/files/lapoduduw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/81141819714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9301/6222/files/84125315686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3975/9256/files/65211729869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6467/1904/files/tuzejozefexawur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7205/9547/files/luwenelozifesavonapafuvin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/complete_key_for_schools_student_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/tipurenuj.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 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000462f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x462F 5440 bytes
SHA-256: 4befad8d06953ef426b3ea8c27245b086391142f0527795f45c729d671e6ae64
font_01_sfnt_off0000586b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x586B 10820 bytes
SHA-256: 9ca1e96ad54d9b7a5e9446a835bc0fa7251b449181be843470034da4bd922b3d
font_02_sfnt_off00007bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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