Malicious PDF — malware analysis report

Static analysis result for SHA-256 6193e34444729a39…

MALICIOUS

PDF

84.3 KB Created: 2020-07-29 20:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31a70593f3f09baf07637a41329cec65 SHA-1: 611367607286494c691482170541af5984c8855c SHA-256: 6193e34444729a3934e0a361f6a7508c3720a613f41295beee933f731ea1566e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating redirection to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated, but the presence of numerous links suggests a link farm or phishing lure.

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=depression+criteria+dsm+5+pdf
    • http://files.mjtravelaroundtheworld.com/uploads/1/3/2/6/132681951/baligixuto-jexifatarez.pdf
    • http://files.smhulse.com/uploads/1/3/2/6/132681053/3689513.pdf
    • http://files.pathportfolio.com/uploads/1/3/2/6/132681891/tawixubulazob.pdf
    • http://files.osteomyelitiscenter.com/uploads/1/3/2/3/132303010/4165838.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/ropajonewododumu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/50641628137.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/38408472845.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/27297544028.pdf
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/mujuluwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/kazax.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/tebarudurewupor.pdf
    • https://cdn.shopify.com/s/files/1/0437/3128/8216/files/jolumekajori.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/26986851600.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/76118181187.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2478/files/mepumidijapavapikanuxubeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0999/files/juvewenenafagam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0497/6548/files/28314793591.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_off00010dd7.bin
cc38bccbb56c68d2e6880d916f2450c167ab68ecfdfe7d3a85fb60648cf7b8dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD7 5180 bytes
font_01_sfnt_off00011f59.bin
7880787ae8e645c8c0841edec27a7d0a2e535b0ad61f3bea39c677b93d63008c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F59 10608 bytes

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