Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f004a59b59bfc6…

MALICIOUS

PDF

34.5 KB Created: 2020-09-04 13:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30debdf63b4aab523f50e2a46812c4ed SHA-1: 05e189a767953d69be6a0b484e1f242127c46da9 SHA-256: 01f004a59b59bfc6c1aa5f4dfc185a53845d4ec17c3ed20f266d5837d54e3156
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.link/wix?keyword=bihari+geet+video', is identified as a malicious redirector. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=bihari+geet+video
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9816/8727/files/chiaro_corso_di_italiano_b1.pdf
    • https://cdn.shopify.com/s/files/1/0457/8505/5398/files/picsart_editing_tutorial_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/bhangra_songs_list.pdf
    • https://static.usrfiles.com/ugd/762c1a_5570f2183b344fec9c1532cbbae80ff2.pdf
    • https://static.usrfiles.com/ugd/277b62_9ccf29ea9e024a2bbac0bdf8c4416c4a.pdf
    • https://static.usrfiles.com/ugd/4dded2_18f524925eef4e5c9235269cb2f4618d.pdf
    • https://static.usrfiles.com/ugd/d4c4cf_e41c65a54abd4c1ab755eb95e64c553d.pdf
    • https://static.usrfiles.com/ugd/902d29_1d584aa744b945a2b875be8ef6fa0636.pdf
    • https://static.usrfiles.com/ugd/4c1554_485c5af4605440aab3f1dd8013a408a3.pdf
    • https://static.usrfiles.com/ugd/f515ca_3caa69cd33f049ae88182e2ccd9d5dc5.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/woxefuderanogalogifapezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/lobosamipetutitozukivik.pdf
    • https://cdn.shopify.com/s/files/1/0446/9299/6252/files/thailand_road_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000040f9.bin
f463899ae4690f44c9f886e8abbcdcb29992c18f5be1bb3540242c08052bce21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40F9 4668 bytes
font_01_sfnt_off000050ee.bin
12d9d4c86031aab2ee3f40eec0dc4786286f401f869dff21ec9760c27c25152d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50EE 8976 bytes
font_02_sfnt_off00006fa5.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA5 4324 bytes

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