Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab537f22787c58d8…

MALICIOUS

PDF

43.7 KB Created: 2020-08-07 00:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cdb6f75e8975b291fa091112b19fca6a SHA-1: d2c04ccc23ecb1b598ec4ffa3e76808a8e7171dc SHA-256: ab537f22787c58d86946ba5dd23202c8b0fc05550ab6ea9a0ea82a669a8d7108
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a specific malicious redirector URL, https://ttraff.cc/pify?keyword=crossword+puzzles+pdf+free, which is indicative of a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains text related to 'crossword puzzles pdf free' and the malicious URL, reinforcing the lure. The presence of numerous embedded links suggests an attempt to manipulate search engine results or distribute malicious content broadly.

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=crossword+puzzles+pdf+free In PDF document text
    • http://files.flatspokecycles.com/uploads/1/3/1/4/131408529/6549756.pdfIn PDF document text
    • http://zigesovol.bdupottersguild.com/uploads/1/3/0/8/130814058/4799799.pdfIn PDF document text
    • http://files.pszichokardiologia.hu/uploads/1/3/2/8/132814219/zonameva-tojexugabejanu.pdfIn PDF document text
    • http://files.maaemi.com/uploads/1/3/1/8/131858661/simimusepaw-kolenar.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/1/0435/9690/6659/files/chopin_ballade_no._1_op._23_in_g_minor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4581/3414/files/8233766965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1378/2173/files/kilakaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9054/2753/files/jokugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81579197248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/function_of_brushes_in_dc_motor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/paropufawiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/jozeberosagodejiwoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/15151571295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/45206698938.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 8

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_off00006ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC1 4872 bytes
SHA-256: a47113622219413708ef1a4ab1b4b4a2e495e3920cbef48e81a0aafcb4906a10
font_01_sfnt_off00007f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7C 10072 bytes
SHA-256: e00ccb43f9cb0bf28298e11bc2bdab06708ff9699273c05906fe0bf10eb927fa

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