Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d90c9e0148951f9…

MALICIOUS

PDF

40.4 KB Created: 2020-08-06 18:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 708015bad9350336db4d46857588a0b8 SHA-1: dd9ed09043d82e3d5ed05550bd844a2cf4442d05 SHA-256: 0d90c9e0148951f9a5377caecf90abc672bd80d26e183f3ee9981e5b6076d416
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com, which is flagged as a redirector. It also exhibits characteristics of a link farm, with numerous links pointing to external PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or redirection attempt.

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=comparison+of+adjectives+and+adverbs+test+pdf
    • http://nigemex.visionkeeperart.com/uploads/1/3/2/3/132303338/71d3d28055d.pdf
    • http://files.kdrecording.com/uploads/1/3/1/8/131858287/sexezaso-xurutujane.pdf
    • http://files.eticorral57.org/uploads/1/3/1/3/131382700/jujenisuwarovasub.pdf
    • http://files.lincolncityglasscenter.com/uploads/1/3/1/6/131607010/9477717.pdf
    • http://files.secondbaptistwalworth.org/uploads/1/3/2/8/132815298/c58c53868b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/53588825384.pdf
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/75834484180.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/28576404930.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/waruzaneterowutig.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4204/files/63396512934.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/15964397547.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/14902674122.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9557/files/linoxupu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/ne_abbreviation_state.pdf
    • https://cdn.shopify.com/s/files/1/0436/9940/4965/files/mudadezanapu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/42361912365.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_off00005e0f.bin
781e27349db320e634416ee2f2d7bd0c0b63d045834af46a486c22de188ea27f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0F 5452 bytes
font_01_sfnt_off00007082.bin
b99697728cf6c899f55b6f2eb977cc687c4ab15c885b305bfc6d1a90e91ecdb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7082 10540 bytes