Malicious PDF — malware analysis report

Static analysis result for SHA-256 5adb0aecc1a3c924…

MALICIOUS

PDF

40.9 KB Created: 2020-08-14 22:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9267c909c45e6c90037529e438e866bb SHA-1: 8e405e8c1fd4954dd5e57175b816d5a0a269efec SHA-256: 5adb0aecc1a3c924f035c62767a5a9b8ec95b033b03863fc16de1aa670abfcee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/wb?keyword=powder%20coating%20problems%20and%20solutions%20pdf`. The presence of numerous links suggests an attempt to direct users to potentially harmful websites, possibly 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.ru/wb?keyword=powder%20coating%20problems%20and%20solutions%20pdf
    • http://files.professionalcapitalpartners.com/uploads/1/3/1/4/131438766/4121815.pdf
    • http://files.mobiledetailinglasvegas.com/uploads/1/3/0/9/130968921/cd3bd1.pdf
    • http://fotinugo.midcoastfitness.com/uploads/1/3/0/8/130873958/vuruwitidikutuxir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/4361417853.pdf
    • https://cdn.shopify.com/s/files/1/0435/8645/3663/files/ch_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/xoporujuxawofadem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3755/files/29323284525.pdf
    • https://cdn.shopify.com/s/files/1/0433/7339/6133/files/kelaleluwemimemebilem.pdf
    • https://cdn.shopify.com/s/files/1/0435/9343/3246/files/movimiento_muralista_mexicano.pdf
    • https://cdn.shopify.com/s/files/1/0431/4788/6743/files/janijorekireganewurulu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0440/9494/files/becker_auditing_and_attestation.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5127/files/athanasius_on_the_incarnation_of_the_word.pdf
    • https://cdn.shopify.com/s/files/1/0430/8860/9429/files/cuet_admission_circular_2020_18.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/48874837725.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/la_tregua_mario_benedetti_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8214/5182/files/70414656916.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_off00006080.bin
3e20fb66150cf4f9ad8971268679711b70579f240bc5b921e3848a25a92debb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6080 5708 bytes
font_01_sfnt_off000073e2.bin
2fb4c2f3135383a687c355284c90f3f19678f817228b2898e76ed12134afaceb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E2 10120 bytes

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