Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf815e80afc2381d…

MALICIOUS

PDF

42.4 KB Created: 2020-08-06 14:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b50e0868a5513942cee4d82dd8f3a18 SHA-1: 46977e760ad9df666f1c890c86c25f98c1baac02 SHA-256: bf815e80afc2381da19e7fbe758ac60b61f24e6cfeb3caee35d6868d5faba540
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to lure victims. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, suggesting a coordinated effort to distribute malicious content.

Heuristics 3

  • 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.
  • 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=oxford+discover+level+2+pdf
    • http://files.foundations619.com/uploads/1/3/1/4/131407029/mazunixidonepun.pdf
    • http://files.lindachapmandesign.com/uploads/1/3/2/6/132683069/redizabokexelimib.pdf
    • http://nipavig.clarelouiseburnett.com/uploads/1/3/1/4/131437363/gibazebowujes.pdf
    • http://files.tuinanz.com/uploads/1/3/0/8/130874278/5642231.pdf
    • http://files.warkprimaryschool.co.uk/uploads/1/3/1/6/131607467/3975095.pdf
    • https://cdn.shopify.com/s/files/1/0433/8080/1701/files/jabimofiwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8036/files/fepilesosovujewepufunava.pdf
    • https://cdn.shopify.com/s/files/1/0435/5234/2184/files/zosirudoxigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/nuance_editor_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2587/4600/files/49499870835.pdf
    • https://cdn.shopify.com/s/files/1/0440/9910/9016/files/finnegan_neonatal_abstinence_scoring_system.pdf
    • https://cdn.shopify.com/s/files/1/0436/2731/5353/files/final_fantasy_7_ps1_rom.pdf
    • https://cdn.shopify.com/s/files/1/0430/7147/1767/files/jolawajomosamilovisuxaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2374/files/kenatekamiba.pdf
    • https://cdn.shopify.com/s/files/1/0436/8341/4169/files/59843888241.pdf
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/nebomatumodojufotilewera.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/rulirokodapesite.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/30354137129.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6384/files/welumojunebanogope.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_off0000685c.bin
6cb8f41868c3f5a0dba19bf720a224a44cb81dd0bb356f3f63526d9d1f53310f
pdf-font-stream PDF embedded font (sfnt) at offset 0x685C 5228 bytes
font_01_sfnt_off00007a48.bin
df5648971670aa3d05c9361be091e4343901e42eb25568bbd0e640724089a77b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A48 10088 bytes