Malicious PDF — malware analysis report

Static analysis result for SHA-256 95295a40a7cbfd72…

MALICIOUS

PDF

35.3 KB Created: 2020-08-06 18:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25e894a1cbb44d03926b7321c0014d93 SHA-1: efcd57d29269dd5917a9cef0d15a108e0efb4453 SHA-256: 95295a40a7cbfd7279b34aed748de67c6c687b3a683bf633cf954ec150232d09
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body also contains this URL, along with numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is likely used to redirect the user to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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=carson+dellosa+math+answers+grade+5+pdf
    • http://files.ndsmallfarms.com/uploads/1/3/0/7/130775306/midujeri.pdf
    • http://files.meaganhesham.ca/uploads/1/3/0/9/130969218/4591974.pdf
    • http://buvewatim.collinsvillecrimsoncadets.com/uploads/1/3/1/3/131384429/resuvojime.pdf
    • http://files.windhoekradioflyers.com/uploads/1/3/0/7/130776490/nafetu-gevotoxi-wekamovomupuli-dofaxutemetawuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3280/5527/files/98687369796.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/dilekotufoxuxewu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3970/9589/files/natikadetakedoxafewivuse.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6324/files/51210949473.pdf
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/20683891495.pdf
    • https://cdn.shopify.com/s/files/1/0450/7769/2581/files/internal_quality_audit_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/7725/4814/files/94536263325.pdf
    • https://cdn.shopify.com/s/files/1/0433/2768/4760/files/43653035476.pdf
    • https://cdn.shopify.com/s/files/1/0432/0113/4747/files/52584545577.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/86266222424.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/nopugiwujim.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_off00004a9d.bin
6ce04f0dc62d0fa9be62a62c9094c7685404c5684696923695560b323f4b054f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A9D 5576 bytes
font_01_sfnt_off00005d82.bin
d2a7d1d0c1b157d2a56c7ccadb6aaefc314e6e7ffb01272eadd37cb97b8a93f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D82 10216 bytes