Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa12e3d88f0d4f6f…

MALICIOUS

PDF

40.1 KB Created: 2020-08-11 17:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ae05d43bcb9efac4b08a28c3fb538f2 SHA-1: e4455e0a6b67f08f0d0afa22aac5a79af9954880 SHA-256: aa12e3d88f0d4f6fe48221adb7da381aed438963f79045bbe0f5f09a1681365c
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary URL, https://ttraff.ru/pify?keyword=causes+of+cervical+cancer+pdf, is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other links to external PDFs, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, limiting the analysis of direct payload delivery.

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=causes+of+cervical+cancer+pdf In PDF document text
    • http://files.pelicancovesc.com/uploads/1/3/0/7/130775049/naguterodujuv.pdfIn PDF document text
    • http://filarapot.publicgypsum.com/uploads/1/3/1/6/131606289/vorarurilodadubobibe.pdfIn PDF document text
    • http://files.gofish-lures.com/uploads/1/3/0/8/130873997/4632486.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/1/0433/0687/7080/files/45397061855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/35411068823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5491/3950/files/windows_10_battery_icon_greyed_out.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0746/6916/files/nifaxapopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6708/8791/files/biodata_format_for_marriage_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77330784460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/ximunasus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7926/1590/files/mawavuvovimigolawisegesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/zixidezajavimibigunon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5552/0673/files/bulthaup_b1_preisliste.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/1748/2919/files/acls_study_guide_2015.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 2

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_off000060f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F6 5116 bytes
SHA-256: d164b87535e7b605f7084cb8ba54d4f0dff3281e7794c8725c48c4c095b3e6a4
font_01_sfnt_off0000726f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726F 9764 bytes
SHA-256: 212eb54d8744b229303a7729d0052738b84e533cc46c21009d877a6df9943196

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