Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba41febd9174a84b…

MALICIOUS

PDF

38.0 KB Created: 2020-08-19 06:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd20d731e7b99e27d5807bf69c51622c SHA-1: 2bc4c0173d1b805f459b2349fe18379f71728231 SHA-256: ba41febd9174a84b8f3d8a03b3eb7714801b4c5674004e34241b4ec0b6c7071a
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link to 'ttraff.com', which is flagged as malicious. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The primary malicious URL is https://ttraff.com/pify?keyword=epidemiologia+cl%25C3%25ADnica+fletcher+pdf, which is likely used to lure victims into downloading further malicious content or phishing for credentials.

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=epidemiologia+cl%25C3%25ADnica+fletcher+pdf
    • http://files.samanthaberglan.com/uploads/1/3/0/7/130776230/5192834.pdf
    • http://files.godsstorygodssong.com/uploads/1/3/2/6/132695994/6392470.pdf
    • https://cdn.shopify.com/s/files/1/0463/0754/1149/files/42536178819.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/17434650948.pdf
    • https://cdn.shopify.com/s/files/1/0450/9748/4451/files/57188937839.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4573/files/create_email_template_office_365.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/appel_d_offre_informatique_quebec.pdf
    • https://cdn.shopify.com/s/files/1/0430/8792/1313/files/kepupazejoxole.pdf
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/73750924472.pdf
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/bipegol.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/1689184186.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000468c.bin
245928e363bf6c48c28f158406dcaf14f0490fad748533313192086053f6f282
pdf-font-stream PDF embedded font (sfnt) at offset 0x468C 5188 bytes
font_01_sfnt_off0000580a.bin
3606c4703c165da48a060770929037ee1fac4a27a2b6fd07b171c77531afe030
pdf-font-stream PDF embedded font (sfnt) at offset 0x580A 10280 bytes
font_02_sfnt_off00007b39.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B39 4324 bytes