Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb56a3c3731a3d1…

MALICIOUS

PDF

47.1 KB Created: 2020-08-06 20:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6326ea83d879c658771c74479d72854f SHA-1: 258c84aef2e0b9d14a59fe363a7db040ee4917ec SHA-256: ffb56a3c3731a3d12b9c62653e3e16b65a6e7da1a8ddbf7bb0520e86d180a881
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 one critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL points to 'https://ttraff.cc/pify?keyword=audit+case+study+questions+and+answers+pdf', which is likely intended to trick the user into downloading further malware. The document body text, though garbled, contains keywords related to the URL, suggesting a lure.

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=audit+case+study+questions+and+answers+pdf In PDF document text
    • http://files.liftnrolltowing.com/uploads/1/3/1/4/131452887/824787.pdfIn PDF document text
    • http://files.pamelabramble.com/uploads/1/3/1/4/131437005/f9aca830fda68.pdfIn PDF document text
    • http://files.ctmeetingspace.com/uploads/1/3/0/8/130874520/71cd9f0c322bb0.pdfIn PDF document text
    • http://files.melreese.com/uploads/1/3/1/1/131164431/jotiwumapugo-jawiponu.pdfIn PDF document text
    • http://files.southernsourceinspections.com/uploads/1/3/2/6/132683181/be5909f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/wemid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/jomoxogefazezajeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/occupational_therapy_toolkit_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/93612186889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0825/files/53615391451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/xuzugixavofukovivenojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6225/5006/files/monavobenonigalul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/26409635013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1835/3821/files/wheel_of_monotony.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/50509415269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/devole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/85290943304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8039/8486/files/wigipetosuregupov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/burukamimidemapowokimug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6133/0591/files/27221609139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF4 5308 bytes
SHA-256: e29593d6207d2aa0d880ad1b8fd4027cb2020681e8975144d85dce4fecb264bb
font_01_sfnt_off00007e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E19 10340 bytes
SHA-256: c53c1bfa0dadb51f0fd433c5f7bb3392d1fd2b76973b8aad04db6dc3f13b6eb6
font_02_sfnt_off0000a0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0DF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34