Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfc5c1c4f799427…

MALICIOUS

PDF

43.6 KB Created: 2020-08-07 13:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1f6716834455963c6b989409b4ce3d05 SHA-1: 88bd9f08972f2514dd818741ffdc8e0dda4ed207 SHA-256: abfc5c1c4f7994278c97d6943fcbb8a547d226f2ada838e58ba3455392370993
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=ruptura+de+aneurisma+aortico+pdf', suggesting a lure related to a medical topic to attract clicks. 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.cc/pify?keyword=ruptura+de+aneurisma+aortico+pdf In PDF document text
    • http://files.worldbaseballproject.com/uploads/1/3/1/4/131483361/povonagotixu.pdfIn PDF document text
    • http://xisula.greyrockfarmcsa.com/uploads/1/3/1/6/131607063/5612315.pdfIn PDF document text
    • http://files.lifeplots2.com/uploads/1/3/2/6/132695213/25d2d172db.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/1/0433/6808/7711/files/lesex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6342/7751/files/noes_bsicas_de_administrao_pblica_para_concurso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/wunemolopane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/80993225028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/western_union_online_transfer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/19604896005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6548/3168/files/33553280517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/63005493349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/xusuzolugijupadudose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/92614762575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/0087/6455/files/upper_back_stretching_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/94980787239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/fixufepodusujafuwefo.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 1

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_off00006c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C54 5276 bytes
SHA-256: 0dc1c845b7b0a67299f0e3930350900d927fec5524a1ced2e4da02815319d8d1
font_01_sfnt_off00007e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E36 10316 bytes
SHA-256: 1a2467f2143e46ded2b13c1d41d968fd4ff4487d729b7adc104eb1960e2b2bd4

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