Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfbd0ab4a5fb8697…

MALICIOUS

PDF

76.2 KB Created: 2020-07-30 02:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 313169ea95d0ec01526eb0bbeb21914a SHA-1: 00d9a0ac20fb3fa791eba4bac87c5296f50ab91c SHA-256: cfbd0ab4a5fb869797164bfbef0562d8964c76773f55e79e55c385d392f4c295
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to '2020 oscar winners pdf'. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to attract search engine traffic and potentially distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=2020+oscar+winners+pdf
    • http://files.a1alarm1980.com/uploads/1/3/2/6/132695428/pimilusow-dogig-koxanewarenaj-ruzogepuru.pdf
    • http://files.ministryofunderwear.co.uk/uploads/1/3/2/6/132681513/jujikewegiseli_givel.pdf
    • http://files.newlifebaptisthp.com/uploads/1/3/1/6/131636890/4628793.pdf
    • http://files.raamarchant.com/uploads/1/3/2/7/132741128/3967222.pdf
    • http://files.hickoryknollthoroughbreds.com/uploads/1/3/1/4/131453255/120d39a5d345b94.pdf
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/55459120220.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/45335691562.pdf
    • https://cdn.shopify.com/s/files/1/0439/7616/3486/files/87501899297.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/dibatinasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/ridewiwadom.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/mowelujozotubafubofogi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/denusi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0525/4566/files/xakak.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/tepijif.pdf
    • https://cdn.shopify.com/s/files/1/0433/5871/6055/files/77896703956.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74251218784.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/8531513845.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_off0000ed97.bin
5a4747d153193f4c31b769aa1997ba37c3a64c2c91aa2616bfd311048e1403d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED97 5096 bytes
font_01_sfnt_off0000feec.bin
042d51827129ddfe8a1ce414571df8ee33daa49485a5ffa207a31d0cd7fc54e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEC 10652 bytes

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