Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fea1b79f9591140…

MALICIOUS

PDF

41.8 KB Created: 2020-08-24 23:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf06fe4a2876aa758621c68a4d2fab99 SHA-1: 6f9b8c14b95252c71e7ff009e5e4a849f26340ec SHA-256: 0fea1b79f9591140bef66bd28a9ca1af164125f68156f422de987ef228e8c617
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to benign Shopify URLs, but one critical link redirects to `ttraff.com`, identified as malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same malicious URL and benign URLs, suggesting a link farm designed to obscure malicious activity. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=beiimaan+love+movie+hd+free
    • http://files.allangelslbk.org/uploads/1/3/1/1/131164431/04f950fe2b5ed.pdf
    • http://files.saltybonedivers.com/uploads/1/3/2/6/132681325/89985d.pdf
    • http://nuwezi.metal-bijou.com/uploads/1/3/0/8/130814295/rubabiwekibilufi.pdf
    • http://rikemu.palmettohighschoolalumniandfriends.org/uploads/1/3/1/1/131164250/1625912.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/attached_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5562/files/sikamojumiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91337380597.pdf
    • https://cdn.shopify.com/s/files/1/0440/8921/3093/files/roxolazisata.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/used_car_bill_of_sale_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8621/7365/files/nugigefupelap.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1477/files/calculus_3_kenyatta_university.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/moxuli.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/53670156182.pdf
    • https://cdn.shopify.com/s/files/1/0430/5944/5914/files/arduino_uno_r3_pinout_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/92145572470.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050e1.bin
5bae6527bcefc02e7535cb547d9dc9e61faa753f6c93ca0492e54a8a579824e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50E1 5080 bytes
font_01_sfnt_off000061fb.bin
6bc10b005558f2a8874b63d1ebf63bb3b008c3d4f7a70743a46337fb064a4170		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FB 10160 bytes
font_02_sfnt_off000084f7.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F7 16164 bytes

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