Malicious PDF — malware analysis report

Static analysis result for SHA-256 81877feb699dffe7…

MALICIOUS

PDF

35.8 KB Created: 2020-08-07 18:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0359b48f7f7d5bcba244eb9480ebc6d SHA-1: 9ffbac57cce314b6aba57970285e9ca80d5e55bd SHA-256: 81877feb699dffe7962e9ce8e9aa9ae420fdd9398b6cd17a915dcb3dabe802a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF document was flagged as malicious by an ML classifier and contains a large number of embedded URLs, many pointing to external PDF files. One URL, 'https://ttraff.com/pify?keyword=empathy+philosophical+and+psychological+perspectives+pdf', is identified as a known malicious redirector. The document's structure suggests it's part of a link farm or SEO manipulation scheme, potentially leading to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=empathy+philosophical+and+psychological+perspectives+pdf In PDF document text
    • http://files.brazosportcenterfest.org/uploads/1/3/0/7/130775592/javimaranof-deraxefar.pdfIn PDF document text
    • http://files.greenislegardens.com/uploads/1/3/1/4/131453897/2333953.pdfIn PDF document text
    • http://files.rivolirallies.com/uploads/1/3/1/4/131483148/fadune_towiraxibinus_lokuragazoz_givamarobajun.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/1/0431/8560/2721/files/35184099034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/3216665278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/84077492265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/37875142034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/vegotetonarowosejevura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8554/4089/files/dabuxagojalerenotewep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32150460784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6776/8981/files/diberamirikoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/kitawosexeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9934/0448/files/fagoxugamazoposoxuvutuvuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/4133528893.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_off00004d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D7B 5688 bytes
SHA-256: b886513964a89a4bd8111bf6cbe26f347784cda90a87720dbd0962c606bc01d9
font_01_sfnt_off000060c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C1 9708 bytes
SHA-256: 1b7ea66bbaa0a74da7723ed179290ba9003f9604ac10fae3a3c318db6e084885

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