Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef4562f5f37c0e9…

MALICIOUS

PDF

47.5 KB Created: 2020-08-20 07:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ba24fa528aef45342223dec344b90ca SHA-1: 7e85e60995489535b9d7b12f730967f4c161e471 SHA-256: 0ef4562f5f37c0e9aa6fcd5c8ff0735eb28442a38d244c5efdd5cf1563d9fc8e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL and a seemingly unrelated technical topic, suggesting a lure. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm or SEO poisoning attempt 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=how+to+set+gridview+adapter+in+android
    • http://pufog.acresoflearning.com/uploads/1/3/1/4/131437657/099431198.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/2439/7989/files/wolexumigiwew.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/59553313197.pdf
    • https://cdn.shopify.com/s/files/1/0438/7956/3419/files/zotofipojuxobuso.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/fivatasakubekeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/2507/1256/files/47461797690.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/15731904876.pdf
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/gatagosanojosinujokekake.pdf
    • https://cdn.shopify.com/s/files/1/0448/0555/4337/files/two_airplanes_flying_together_in_formation.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_off0000722f.bin
0b2d03af96bd936402a158986dba3a61e329b45da9424959fbf166a401fdf4cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x722F 5208 bytes
font_01_sfnt_off00008410.bin
f5c48829da7839e6de1a02ca5731175b487094b6a3240e3041c32cd36a06a32e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8410 14316 bytes

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