Malicious PDF — malware analysis report

Static analysis result for SHA-256 33727c42edcad5b3…

MALICIOUS

PDF

87.0 KB Created: 2020-08-11 01:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b6eeef6e51d4a2618173a6260011d3d SHA-1: b60beef68fe3829590605fcf520a736ae32de9b9 SHA-256: 33727c42edcad5b3404270080518acc3a7507f5ba2033ee401178a2a1025e783
234 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.cc/pify?keyword=tumor+de+cervix+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs, likely for SEO manipulation or to obscure malicious destinations. The presence of a visible LOLBin command execution instruction suggests the document is designed to execute commands or download further payloads. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the lure.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=tumor+de+cervix+pdf In PDF document text
    • http://tiziliw.columbusbas.com/uploads/1/3/0/7/130776433/zegijegilim-nukaxix-waline-kunabakazag.pdfIn PDF document text
    • http://files.delsocialmedia.com/uploads/1/3/1/8/131856705/8ddc768d527.pdfIn PDF document text
    • http://files.carolinacounselingwellness.com/uploads/1/3/1/0/131069879/sizuzopixilo-tetituvo-naten-luxigudajagafi.pdfIn PDF document text
    • http://files.fiercefabulousflawless.com/uploads/1/3/1/3/131398219/xuzosabez_gutivenavera.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/1/0430/0800/0163/files/pronunciation_exercises_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5978/9472/files/62394351816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/vokosavevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/53240875783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1907/4722/files/puwezivudopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/77040205156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/lususoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/breast_pumps_target.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8107/2789/files/instalacion_sonda_vesical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4116/8283/files/serotonin_pathway_in_brain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/tarat.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11675 4960 bytes
SHA-256: e550d72c6d893a1329784b289362f96208a6c04091fc510a8f4690b9ddea6a0f
font_01_sfnt_off0001274a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274A 11604 bytes
SHA-256: a442fcbe2e0f072868a893307caeef6f5c58008875c43ae4cecce6e6e082b19f