Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9076c095ecb06a…

MALICIOUS

PDF

44.6 KB Created: 2020-08-18 16:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cfc84a97215f43976e6b7afdd255f4b SHA-1: c8cf9d39bdeb7724baeae1b115ae825776f8f80e SHA-256: 5a9076c095ecb06a41175a4011c61f29fd9e31311fcbd977c32258250f1dd00e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The document body, though partially corrupted, includes the malicious URL, suggesting an attempt to trick users into visiting harmful content, likely for further exploitation or phishing.

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.cc/pify?keyword=barasuara+album+pikiran+dan+perjalanan+rar
    • http://files.rockingchairuniversity.com/uploads/1/3/2/6/132681951/derufisafuso_lapiwegokotisu_jejer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/4311/8495/files/xetegeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/guide_taille_ceinture_femme_tommy_hilfiger.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/class_12_chemistry_coordination_compounds_notes.pdf
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/mesaza.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/dofusarugewobuvigafusezef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/rexurilujawuma.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3979/files/813112705.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/39956556214.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/couper_un_en_plusieurs_foxit.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/61313482875.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/94685179241.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5335/files/bupisudojapazaluxoxolal.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_off00006240.bin
9fb5e3d4fc26dbdb9e9b6a543a5e4419c5fc71928b3a0e4bf09bcbb1df8934fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6240 5124 bytes
font_01_sfnt_off0000737c.bin
708429d44a9f9b5168ff3b0e8390037567b03b8dc167adc9ac04a6ad89f760b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737C 10388 bytes
font_02_sfnt_off00009714.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9714 4324 bytes

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