Malicious PDF — malware analysis report

Static analysis result for SHA-256 025ba9ce4a2118a9…

MALICIOUS

PDF

41.0 KB Created: 2020-09-13 03:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01f03f3cc923583a5157243f2a90879d SHA-1: 0ccc56a8c890053314ac4d0948a5f1f040624ed5 SHA-256: 025ba9ce4a2118a9ca7b115c8869ff73bc16bad3732ba359cef1e60ad8f961f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.me'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which are hosted on suspicious domains. The ML classifier also strongly indicated maliciousness. These factors suggest the document is designed to redirect users to malicious sites or to distribute further malicious 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.me/wix?keyword=death+in+tehran+parable
    • http://raseguf.lionstationers.com/uploads/1/3/1/4/131408899/2552104.pdf
    • http://files.midvalleydoulas.net/uploads/1/3/1/4/131406391/lonanis-rulufuwigivur.pdf
    • http://files.all4pawsdogrescue.com.au/uploads/1/3/0/7/130776296/3560341.pdf
    • http://bujilami.vitalis-foundation.net/uploads/1/3/2/6/132681495/3872217.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e9cba9_6c62839084564cb7ab7a3fab95f34ff6.pdf
    • https://static.usrfiles.com/ugd/5be868_661b97dcf71e4c54800795ecce1d754a.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/birches_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0429/4787/0876/files/dapolupodukebotememege.pdf
    • https://static.usrfiles.com/ugd/6cf804_8f214cda00aa458092795d69de279b5c.pdf
    • https://static.usrfiles.com/ugd/911c12_4e6864392c234d5b99364c831dda6646.pdf
    • https://static.usrfiles.com/ugd/d8966e_d9f7c2b6768e4d719f413432cd8e6e0b.pdf
    • https://static.usrfiles.com/ugd/e9cba9_d58e05da9d6a4b8699d554058415ce5e.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_off00006476.bin
4761b9e9871d412446cc937cf49ee799f1f05049f0d75d4cff33a564fa493ed7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6476 4868 bytes
font_01_sfnt_off000074fa.bin
b21d57bd4af74c7e4ff62b60a02ecb1cd0d530e9e87b71b59aafad874c5e3056
pdf-font-stream PDF embedded font (sfnt) at offset 0x74FA 10104 bytes