Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2b15464a92a1e8…

MALICIOUS

PDF

31.4 KB Created: 2020-08-28 03:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1f2f234bf0c731af664176948d8ddef SHA-1: fde2a77cd962f6b78c9c87262ee28bb04164408b SHA-256: ce2b15464a92a1e802ccc66e10347a64ad8354331fcf9794ff3263b4173fa7c8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a Whirlpool appliance manual. This redirector likely leads to a malicious payload. The document also features a large number of embedded links, many pointing to Shopify, which is a common tactic for SEO poisoning and distributing malicious files. The ML classifier 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.com/pify?keyword=whirlpool+duet+steam+manual
    • http://files.fortbrookgames.com/uploads/1/3/1/4/131407227/sowobo_tavugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1647/9132/files/3316207435.pdf
    • https://cdn.shopify.com/s/files/1/0447/5263/4005/files/essay_templates_for_college.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0451/1593/2825/files/grievance_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0439/0410/6651/files/12039540594.pdf
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/sevigilitabatogawifupasud.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7525/files/dental_caries_causes.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/bugirotad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bibekejufalakudogaloseja.pdf
    • https://cdn.shopify.com/s/files/1/0435/9405/5843/files/69941464558.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/mutureru.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004110.bin
478a47fe59ec912df7144106f305b2e1aa59e2a7d73b979253c1233001239f58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4110 5212 bytes
font_01_sfnt_off000052a6.bin
689ea704b055d3dc7ca2fdc23e843b47e6f0db5b4bb42001874634d865a7b447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52A6 8900 bytes

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