Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a57abcdf251d9a…

MALICIOUS

PDF

64.8 KB Created: 2020-08-10 04:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02b8a94d899d365e9f412ee4a5afe318 SHA-1: 2e997fe6357430f3ab6fc3bdfd70ad70ba9ac96f SHA-256: c2a57abcdf251d9aa2106d520b8a89c425c5863b9b70631ab08d42649be1e199
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 ttraff.ru. The document body, though heavily corrupted, contains text fragments and the same URL, suggesting a lure related to a banking dictionary. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com, likely for SEO poisoning or to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=dictionnaire+bancaire+fran%25C3%25A7ais+anglais+pdf In PDF document text
    • http://files.christaresources.com/uploads/1/3/0/7/130775679/ef98c361f57ab1a.pdfIn PDF document text
    • http://files.vaughantractor.com/uploads/1/3/1/4/131453124/fe426e2bbb5347c.pdfIn PDF document text
    • http://kipun.denisecowleeditorial.com/uploads/1/3/1/4/131482976/7748be.pdfIn PDF document text
    • http://files.brjcdac.org/uploads/1/3/1/6/131607005/zagojof.pdfIn PDF document text
    • http://files.janetalexander.net/uploads/1/3/1/6/131606046/gugozo_xakef_xinal_lipajitupax.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/1/0428/7306/1532/files/gokuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/28009963448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1791/8875/files/escience_labs_biology_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/rubokeviduru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7418/2563/files/thomas_calculus_12th_edition_solution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/ketegixas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/ritazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0280/5921/files/architectural_ethnography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/wedusejisosuvevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3420/4567/files/39562650064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4048/0164/files/civic_2020_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/zatolewobutirujem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/libros_sobre_generos_literarios.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b7fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB7FC 25316 bytes
SHA-256: 9014207e91ad0a0284d3c7b175e2a7ee21e408bb26b7bbf6b449d1c818efd88e
font_00_sfnt_off00007592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7592 5432 bytes
SHA-256: e32a33b8bb8bffd52dcc312a33da07d56cda112af4807a3d557361c17c8b6ad4
font_01_sfnt_off000087c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C7 16128 bytes
SHA-256: c1c291abdda91bda6a1aebaa6089adc893c7d0c7701617cc148c401a498df1d9
font_03_sfnt_off0000e480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE480 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c