Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d1ff4275178a06…

MALICIOUS

PDF

39.6 KB Created: 2020-08-19 03:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e2db7ee1d8d37e9e6c1cb532916037c SHA-1: dff7e159026f6c7d8f56aab31145f3749b8d1655 SHA-256: 69d1ff4275178a06a8a35d5884427f068569d477b96c1188be56efc13ee6a092
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with 22 external PDF links, one of which, ttraff.ru, is known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same malicious URL. This indicates the primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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.ru/pify?keyword=anemia+microcitica+hipocromica+en+ni%25C3%25B1os+pdf
    • http://files.flissyscoffeeshop.co.uk/uploads/1/3/2/6/132681796/dexevavizokuba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/7722/1017/files/62287185135.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6505/files/zadavoposegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/zinezimagizubejidiju.pdf
    • https://cdn.shopify.com/s/files/1/0435/2121/2570/files/accounting_financial_statements.pdf
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/freckle_juice_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/yowhatsapp_2018_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0730/files/57093447713.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0274/files/rolozuxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2668/4824/files/castrol_magnatec_diesel_5w_40_dpf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/50341232787.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_off000059eb.bin
ac88c7480f4936fe16bf3a0a4ee838bd249dc13e60c6baf2bb5dd432588c76e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x59EB 5564 bytes
font_01_sfnt_off00006c5c.bin
c4942a64077faafc2094af1b5c9188578b62dfd61c53d6ff52d90e24cddb1be0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5C 10320 bytes