Malicious PDF — malware analysis report

Static analysis result for SHA-256 0902b0dc47d28ec3…

MALICIOUS

PDF

42.9 KB Created: 2020-08-12 11:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 538cf48113fe11ef016d56ad3c9a04b9 SHA-1: 66c52a91d2d74bb575795a8e557916ff0b35b9a6 SHA-256: 0902b0dc47d28ec38b4f3b95332bfe1305a1c3abb75bf89c186a4a732a025a4b
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting a SEO poisoning or spamming campaign. The primary malicious URL identified is https://ttraff.ru/pify?keyword=ahwahnee+principles+pdf, which is likely used to redirect users to 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.ru/pify?keyword=ahwahnee+principles+pdf
    • http://files.marisatcohen.com/uploads/1/3/1/4/131410007/2019329.pdf
    • http://files.bradfordscholarship.org/uploads/1/3/2/6/132681456/5622002.pdf
    • http://files.hawaiijudaica.com/uploads/1/3/0/7/130775431/7824029.pdf
    • http://files.nurturefamilychiropractic.com/uploads/1/3/2/7/132740804/vuwutiwuka.pdf
    • http://files.naturaincognita.com/uploads/1/3/1/3/131383305/9651391.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/29345885776.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/fibitedezigida.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/5559112936.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/misobaxilagugixikobusorus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7347/8560/files/24937117935.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/jawadirofaki.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/vuzadokiwamuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/zuxaxajujulurofo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5833/0786/files/49776846408.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdf
    • https://cdn.shopify.com/s/files/1/0438/5370/9472/files/akuntansi_keuangan_menengah_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/13173894535.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_off00006a07.bin
4d00420256b2861adba8c6f18345bab5db6669b36d1279ec3bac03158ce5154f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A07 5324 bytes
font_01_sfnt_off00007c25.bin
ba72b43a4913f5a3a0ec521615701e750c6aa8de6224ea330a3878872b86afd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C25 10104 bytes

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