Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d2c3d6737ef821…

MALICIOUS

PDF

38.1 KB Created: 2020-08-18 19:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2f5154f6d5348e0f2891cd01b8a856a SHA-1: 26b945c9ffa77d4cb65a8b1666d6063d348256cb SHA-256: 07d2c3d6737ef8217414281784ee1bc379379c46f57ec3848646b51aece1a2bb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure for educational materials, suggesting a phishing or scam attempt. The presence of numerous external links, many pointing to Shopify, indicates a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=free+addition+practice+worksheets+for+kindergarten
    • http://files.nothernlightsfarm.com/uploads/1/3/1/3/131379971/vepozosavaxumexow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/nopimekalenusimegozo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7806/5059/files/brucellosis_in_cattle.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/3753315534.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/24309205643.pdf
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/td_title_date.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/21681022409.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6726/files/77035699715.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/wubokoxupofuvegewoxa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000570a.bin
ffde1972a01e6163c167cc37e143a0c5549269323a81551d4f79b8f51a7731b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x570A 5496 bytes
font_01_sfnt_off000069cd.bin
4d128bc42bd6b60a812d34c95a87ac340062c0c6595b43877705018061a6bf38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CD 9976 bytes

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