Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e031186a6d3cfb…

MALICIOUS

PDF

46.1 KB Created: 2020-08-06 06:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7e59d7d76414832f277312afe23ff2a SHA-1: db8e4627936d65c23071a83cc35aee81e667f5f9 SHA-256: b1e031186a6d3cfbc92269b2ffdcb6f6fa7911b26dbbd7166006f8ff086f7889
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifying a link to a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of the URL 'https://ttraff.cc/pify?keyword=hormones+in+human+body+and+their+functions+pdf' suggests a lure related to health information, likely to trick users into clicking malicious links.

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=hormones+in+human+body+and+their+functions+pdf In PDF document text
    • http://files.ricelakemodelairplaneclub.com/uploads/1/3/1/3/131380482/1595841.pdfIn PDF document text
    • http://files.kimce.org/uploads/1/3/1/4/131437229/3143ec11d9c.pdfIn PDF document text
    • http://files.laurierobertson.ca/uploads/1/3/2/8/132814415/sefofatisujoganar.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/1/0436/2177/7570/files/ganovenigelesexonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/jaleluzuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/33607863350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/82307782721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9776/5528/files/92384273031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/68195586734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/barron_s_us_history_regents_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/jazoguxixojox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/53713953237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4295/3626/files/62692812642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/13973432014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/66450386648.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 4

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_off000074b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 5564 bytes
SHA-256: 4aba6240d0a5f8d92b779cd6bb18e94cefd498284720839db377d3a8740f6ae1
font_01_sfnt_off00008775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8775 10004 bytes
SHA-256: 72f38ce1913493908563e14e6769934e71e1c709822b8fb6fcf2685dc4e3f1b0

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