Malicious PDF — malware analysis report

Static analysis result for SHA-256 531e3290003a70b7…

MALICIOUS

PDF

41.9 KB Created: 2020-08-05 05:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b9134cad80372768ab1abff659ea7800 SHA-1: f87f9e5ba19ddadb4fa4925e6efdf6a9e24de8f5 SHA-256: 531e3290003a70b74fa2eae999873a6be1f514cc6972317ebd88bd966b60ab2f
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=the+usefulness+of+useless+knowledge+pdf+download'. This URL is designed to lure users into downloading a PDF by disguising the malicious intent. The document also contains a PDF link farm heuristic, indicating a large number of external links, many of which point to Shopify domains, likely for SEO manipulation to increase visibility. The ML classifier strongly supports the malicious verdict.

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=the+usefulness+of+useless+knowledge+pdf+download In PDF document text
    • http://puwigus.shopthornburyfromagerie.com/uploads/1/3/1/3/131398091/visetiruwita.pdfIn PDF document text
    • http://files.jordanbc.org/uploads/1/3/0/7/130740249/0475c81eb2bb5.pdfIn PDF document text
    • http://files.cdl-canberra-ec.com/uploads/1/3/1/4/131406843/pukurajagefapu_xamuwos_togomisojor.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/1/0428/7207/8499/files/webufesekulagedab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9348/1885/files/kagakufev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/97597337830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/vibexeri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4788/4702/files/xedigezawifopemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/how_to_disable_ansel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1977/8723/files/anaphylaxis_action_plan_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9016/5403/files/20137185278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7703/3372/files/94716720738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/petidexuzexubisufemavat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1324/9944/files/pokibanepudibapilugupuwiv.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 6

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_off000063b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B1 5312 bytes
SHA-256: 7b2ad5d735cfd1e58571ac0d4f17fdf5ea17fd693fb8d0bf0e9a522e5ede6f8d
font_01_sfnt_off000075de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DE 10748 bytes
SHA-256: f44c6d25c1d0a5407dd820f2270bc785cac591fcc251d1d304853bc476c2d04e

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