Malicious PDF — malware analysis report

Static analysis result for SHA-256 611454f5aa429a42…

MALICIOUS

PDF

50.3 KB Created: 2020-07-30 03:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3373c457b53de9eb8f4a3aa3e7ab6f1e SHA-1: 88248297819cd6863bd3992be9f20b7dda6c707c SHA-256: 611454f5aa429a421c22179ec6d60422a6eae673e6b5c8cc049a41d5751ab235
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links designed to redirect users to malicious infrastructure, specifically identified by the 'ttraff.cc' domain. The document body, though heavily obfuscated, suggests a lure related to 'arm exercises with resistance band pdf'. The ML classifier strongly indicates malicious intent, and the presence of numerous external PDF links points to a link farm or SEO manipulation tactic.

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.cc/pify?keyword=arm+exercises+with+resistance+band+pdf
    • http://files.asbpw.com/uploads/1/3/0/7/130738792/kizaz.pdf
    • http://files.thedailydiplomat.com/uploads/1/3/2/6/132695698/zolobu.pdf
    • http://files.cupe960.org/uploads/1/3/1/1/131163761/227619.pdf
    • http://files.elevatechurchli.org/uploads/1/3/1/8/131871477/4562609.pdf
    • http://files.onceuponarockvermont.com/uploads/1/3/0/8/130813524/xiweviwa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/99799830677.pdf
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/92188731246.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/novuwujenoraxoweguvibasev.pdf
    • https://cdn.shopify.com/s/files/1/0437/1451/1001/files/15342384310.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/22654855680.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1480/files/kakosezegelipef.pdf
    • https://cdn.shopify.com/s/files/1/0437/7339/5106/files/83032946735.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/6596676406.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/77083425945.pdf
    • https://cdn.shopify.com/s/files/1/0433/9177/8965/files/tinukilug.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/39353960740.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_off000086c5.bin
3243809887627a79f4b83a221b3a0884bb6269f993a6e5629d991dbe3be765b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86C5 5328 bytes
font_01_sfnt_off000098bc.bin
c39a91fc519eff3656f29dcf4e3be6b7b79430959a20646da40c9c0670773591		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98BC 10320 bytes

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