Malicious PDF — malware analysis report

Static analysis result for SHA-256 14368f9db4d1bf3e…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 14:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebc3b69e550d940eff8299561e3bd58f SHA-1: 2516405902f7a89e34d81d90d316c08f9459d590 SHA-256: 14368f9db4d1bf3eed67cf1c5c706315e12519c0c6620e9c8f5c1fb692dfec19
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a link farm infrastructure. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious redirector and a link farm suggests an attempt to lead users to a malicious site, likely for phishing or malware distribution.

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=baby+dance+video++mp4
    • http://fisasemu.gingersnapsapparel.com/uploads/1/3/1/8/131856602/b30b199509786.pdf
    • http://falekure.akronglassblock.com/uploads/1/3/1/6/131637562/gapivid-dunekin-gupuvutu.pdf
    • http://zabitowuf.ohiooutdoorstructures.com/uploads/1/3/1/6/131606490/sijusupogepokupo.pdf
    • http://files.myzticisle.com/uploads/1/3/1/4/131409200/8869690.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/best_time_server_to_use.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/35674081357.pdf
    • https://cdn.shopify.com/s/files/1/0438/3562/1536/files/herbivore_carnivore_omnivore_teeth_comparison_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/dojipoxanog.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/89781438466.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7272/files/asia_river_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/6875/8943/files/zizalegineteli.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/rilegopofupururoxef.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/87711927526.pdf
    • https://cdn.shopify.com/s/files/1/0454/2483/6764/files/digumalejigalusigarokug.pdf
    • https://cdn.shopify.com/s/files/1/0446/9614/1980/files/20568039383.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1006/files/alphabet_letters_writing.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/99961043889.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_off00006b7a.bin
1f099deb4021aaad6e55b691df7f6770f90897039f31c0586de421ddf15abf17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7A 5352 bytes
font_01_sfnt_off00007da7.bin
bbe6da25a2e9c5c391be1f576d126c0797ccabcc9e975929bce8d6cceed83068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA7 10192 bytes

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