Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff27025f927a08e…

MALICIOUS

PDF

44.2 KB Created: 2020-08-08 10:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 616fb71dbd495abdbcbbfb9bfb918a58 SHA-1: 0e026493a2fdb131307ea80e2c9c9eff5b6fd699 SHA-256: 7ff27025f927a08eaa89064066f8071f31324266b34de4ae48ac86cf3e0d2182
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including a primary redirector to 'ttraff.com', indicating a link farm or redirection attack. The document body, though heavily obfuscated, contains text suggesting it is disguised as a poetry book PDF. The ML classifier strongly flagged this PDF as malicious, and the presence of a malicious redirector URL confirms its intent to lead users to harmful content.

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=atticus+poetry+books+pdf
    • http://files.rccghopmd.org/uploads/1/3/2/6/132682230/potaseve.pdf
    • http://files.rayzimmermanauthor.com/uploads/1/3/0/9/130969343/didudedum_fifojisumejira_bobos_pejozepobaw.pdf
    • http://files.vomhiddencreek.com/uploads/1/3/1/6/131606127/kukuko.pdf
    • http://files.sidingsupplyinc.com/uploads/1/3/0/9/130969151/9809764.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/elasticity_theory_applications_and_numerics.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/42014442316.pdf
    • https://cdn.shopify.com/s/files/1/0436/7004/4825/files/76621869687.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/mepez.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/gozid.pdf
    • https://cdn.shopify.com/s/files/1/0435/8324/2401/files/tapuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/jexakapefafar.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4743/files/50003319656.pdf
    • https://cdn.shopify.com/s/files/1/0437/8394/6401/files/azucar_celia_cruz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/35616764689.pdf
    • https://cdn.shopify.com/s/files/1/0439/3598/9915/files/how_to_download_audio_from_youtube.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_off00006183.bin
bd05e36ef2436d441188129be5452649dc1eaaa4ba7edfaa87cbe5b613e5b8d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 5200 bytes
font_01_sfnt_off00007354.bin
5c6583c15d476317bdd9b5ffd75aeca2dfb7d57a2d3c0b49e362faaf7d309d7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 15664 bytes