Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8e5189edd9ea82…

MALICIOUS

PDF

66.7 KB Created: 2020-08-25 11:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1785bec38d7a7fb919a47916c2ef5101 SHA-1: d73bc555aeb28e1af2f9e1cbcb79d65f92b1befd SHA-256: df8e5189edd9ea820f1effa38c8de077bd76dc8f94eed4cfab0c4ad37b3f3301
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL (https://ttraff.com/pify?keyword=gnomeregan+pet+battle+dungeon+guide). This indicates a likely SEO-based link farm or traffic generation scheme. The document body, though heavily obfuscated, contains the same lure text, reinforcing the malicious intent. No scripts were extracted, limiting the analysis of further payload delivery.

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=gnomeregan+pet+battle+dungeon+guide
    • http://files.krecklaugermanshorthairs.com/uploads/1/3/1/3/131383318/xugotaxabidemapemo.pdf
    • http://fatogi.freeheartclinic.com/uploads/1/3/1/6/131607505/a9373701cdb0e.pdf
    • http://pewek.gbcmtx.org/uploads/1/3/2/7/132710714/9811451b84119.pdf
    • http://files.purelifealliance.org/uploads/1/3/2/8/132814935/9766190.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/44574425914.pdf
    • https://cdn.shopify.com/s/files/1/0431/2462/1473/files/26025152386.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5480/files/61636759628.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/zejej.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/gapevedete.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0835/files/4955739864.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/telepefomujemepamivi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4002/0382/files/vesavajolabagi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/45558628262.pdf
    • https://cdn.shopify.com/s/files/1/0428/4124/3814/files/republic_commando_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/85355886658.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.pdf
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/86096590438.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2580/files/61215281928.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1879/files/tefaler.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc23.bin
853b3d986a5fc84a40b6079dbebc4bc62eb4aa8cd3f1fa414586b37689af9970		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC23 5272 bytes
font_01_sfnt_off0000cdf3.bin
ad7cdea5d1f103841ae6233da8bd7b592e6eb356687309f6c84aa37ea89f2bac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF3 15140 bytes

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