Malicious PDF — malware analysis report

Static analysis result for SHA-256 035471e876eed126…

MALICIOUS

PDF

53.7 KB Created: 2020-08-30 18:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d00e3ca3e3492114b654086fc6f8cd6 SHA-1: 2adb0cbb2b7fb4f30602642278a96dfaedffb956 SHA-256: 035471e876eed126d609d93c6237e181398f77abebbad77d9e9bb225919256c5
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 SEO-optimized PDF files hosted on Shopify. One of these links, https://ttraff.com/wix?keyword=one+man%2527+s+wilderness%253A+an+alaskan+odyssey, is flagged as a malicious redirector. This suggests the document is part of a link farm designed to drive traffic to malicious sites, 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/wix?keyword=one+man%2527+s+wilderness%253A+an+alaskan+odyssey
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/chlamydia_trachomatis_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0429/4672/3996/files/wuxanupog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9191/0038/files/internal_audit_closing_meeting_template.pdf
    • https://static.usrfiles.com/ugd/b8c837_56c69a133a9e4447b6721566e63020f2.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_9f8b8ef1175d41e9a6b752fc61987a1a.pdf
    • https://static.usrfiles.com/ugd/bfbc46_6bb41139e3bf4503bb55b29fd963f662.pdf
    • https://cdn.shopify.com/s/files/1/0437/4118/4165/files/remove_character_from_string_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0436/1512/5662/files/covidien_suture_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/mixifupujawufomewonoxibib.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b344450f25b49bf95e1d2fa05b85f01.pdf
    • https://static.usrfiles.com/ugd/6f9b04_eb321c583f9042c9858b86f2a3d0c722.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9cb98e7aaa244ebb303e8d3e69481bb.pdf
    • https://static.usrfiles.com/ugd/097bd5_7f4f5b2d09dd4bf3a95a78f84da381f4.pdf
    • https://static.usrfiles.com/ugd/5de1df_c60be79ee4894ecdab8026bfefe8402c.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_off00009168.bin
dab1639f8400b9040a575ccbc57a326f86c6b56085197e4f3247b48e4be5db42
pdf-font-stream PDF embedded font (sfnt) at offset 0x9168 5340 bytes
font_01_sfnt_off0000a38c.bin
ae2a5eac267b09b30b44d3e882f51168996dc75471fdb7b8a1428b75f4877e7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA38C 11484 bytes