Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbd55bc71f6ff2b…

MALICIOUS

PDF

37.5 KB Created: 2020-08-28 00:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9a0462aa3edde8f55d1a9fbca725c5d SHA-1: 85bb8677536e0706e6b33e786d21b2380abd0851 SHA-256: bfbd55bc71f6ff2b55ed9d24d74ad5865e45da4b2314f6316b41532ceee01dd0
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One of these links points to a known malicious redirector, while others form a link farm, suggesting a spam or phishing campaign. The document body is heavily obfuscated and contains a reference to the malicious redirector URL.

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=exercices+communication+non+violente
    • http://files.grannysherbs.com/uploads/1/3/2/6/132681836/54b8e7.pdf
    • http://nixaxalap.praxisreno.com/uploads/1/3/1/6/131606127/d28582ae02da6.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/calligraphy_alphabet_letters.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/wavureto.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/39859363551.pdf
    • https://cdn.shopify.com/s/files/1/0433/3279/6574/files/latasifizamijirug.pdf
    • https://cdn.shopify.com/s/files/1/0435/9382/6463/files/fafnir_s_storeroom_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/certificat_de_cession_vhicule_modifiable.pdf
    • https://cdn.shopify.com/s/files/1/0458/0809/1302/files/vevezunula.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/nilolezogilujosazuxob.pdf
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/baluditoxalugujafiti.pdf
    • https://cdn.shopify.com/s/files/1/0435/2642/2687/files/77872189747.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_off0000569c.bin
d39646da0a730d6df41e8ebf6492a918a683eacba83db9bd611343abbd3870e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x569C 5032 bytes
font_01_sfnt_off000067a6.bin
67704c4883263856339488751681bece9e7c45199c4d8aee943842716bb89b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A6 9864 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.