Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb32a1c7bc100bf1…

MALICIOUS

PDF

43.5 KB Created: 2020-08-05 22:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5345c662d579d499b55c7dbd6ff9b94 SHA-1: 6b63ddb21b563298f128c5f109165292ccc4a2e3 SHA-256: fb32a1c7bc100bf1e49e9c566f5a5cfb0a01fa403875363f835d7a56f860b07d
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. Additionally, it contains a large number of embedded links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector and the link farm pattern suggest a delivery mechanism for further 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.cc/pify?keyword=advantages+and+disadvantages+of+multiculturalism+pdf
    • http://files.konspiracycosplay.com/uploads/1/3/1/6/131606395/8eedcee4.pdf
    • http://files.miamibluebullies.com/uploads/1/3/1/4/131408537/tomexuje_xusevamebagowix_lusobasub_rexujewozoluv.pdf
    • http://files.ribbonsbiz.com/uploads/1/3/2/6/132695391/c9ad23d48c764.pdf
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/87287467016.pdf
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/canl_c4_b1_tv_izle.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/48357598993.pdf
    • https://cdn.shopify.com/s/files/1/0432/0064/3236/files/34145724434.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/222223695.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/35103492084.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/nepoludodirikipemupobagop.pdf
    • https://cdn.shopify.com/s/files/1/0436/7931/8166/files/godrej_steel_almirah_price_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2931/files/judaxupizomexaxubatagava.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/29673484423.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/55688883776.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/10090872414.pdf
    • https://cdn.shopify.com/s/files/1/0433/3489/3718/files/buttons_on_xbox_one_controller.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/lukenuwatibujizodosajoras.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_off00006aa1.bin
13e9014560d5c0aba9c3edbf428927aad86a88787ec9217ddb56131206fa40be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA1 5524 bytes
font_01_sfnt_off00007d61.bin
12fde13fd86ff079a1a09bfa118a6e772470a9ad893f3891fd1b827936cfc62a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D61 10312 bytes

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