Malicious PDF — malware analysis report

Static analysis result for SHA-256 815f0e1464fbbbe7…

MALICIOUS

PDF

53.3 KB Created: 2020-08-29 16:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01566ffd6792a1a1cd987ed5e6045e68 SHA-1: e957624e46501330f0a8d068c0a38f05cfc306b4 SHA-256: 815f0e1464fbbbe7f23cdedc782c3f73e14d097a01556e64715916445d65ee89
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, one of which is 'https://cdn.shopify.com/s/files/1/0428/4225/9612/files/betoxidazovizimenigoloju.pdf'. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text, though partially corrupted, contains the malicious URL and appears to be a lure related to scientific equations.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=ecuacion+de+clausius+clapeyron+y+antoine
    • https://cdn.shopify.com/s/files/1/0428/4225/9612/files/betoxidazovizimenigoloju.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1588/files/asc_606_revenue_recognition.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/spasfon_pour_vessie_hyperactive.pdf
    • https://cdn.shopify.com/s/files/1/0463/2671/0432/files/lakiwesiku.pdf
    • https://cdn.shopify.com/s/files/1/0460/6781/0459/files/hemoglobin_dissociation_curve.pdf
    • https://cdn.shopify.com/s/files/1/0430/6160/8599/files/78517622761.pdf
    • https://cdn.shopify.com/s/files/1/0439/9661/0718/files/83045406919.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/byomkesh_bakshi_english_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/dusise.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/77462270885.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/fire_ringtone_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9309/files/definition_of_cellulitis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51686393220.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/jotapotazonapeganokabo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/hierarchy_of_needs_by_abraham_maslow.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_off000072c7.bin
7665d1be0b6d0bf6b69104e95d05c0f77a72d2eaf47ba73abfc84dbf8b70064a
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C7 5128 bytes
font_01_sfnt_off00008444.bin
c4a24d4ece41e302e29bb368c76ce7d7fbb951e6e16bf487c163c0fe8e82b7d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8444 14668 bytes
font_02_sfnt_off0000b2dd.bin
0df469ace8b4ae32ddae26db737700b3392f1fb76fa011a6c64c309f4ff08844
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DD 16064 bytes