Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee8e4d335e46eed…

MALICIOUS

PDF

50.7 KB Created: 2020-08-24 01:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 064d68bd5898cd12c4cb125ce5064721 SHA-1: aff38c5b3d745e3593f5d95069c1897b6f1c7568 SHA-256: 7ee8e4d335e46eed25175cf07db8cd0336ca034065c04b06b29fe748c373c12d
150 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to ttraff.cc. The document body, though heavily obfuscated, contains text related to a 'social science and medicine short report' and the malicious URL. The presence of numerous links, many pointing to Shopify domains, suggests a link farm or SEO poisoning attempt to drive traffic to the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=social+science+and+medicine+short+report
    • http://files.buddycushmanfineart.com/uploads/1/3/1/6/131606694/bunomene.pdf
    • http://files.rachellelabellesbooks.com/uploads/1/3/0/8/130874284/8995145.pdf
    • http://files.frechettefarms.com/uploads/1/3/0/9/130969403/xukukewefarizarek.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8832/files/5897429404.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/chemistry_igcse_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/vepufune.pdf
    • https://cdn.shopify.com/s/files/1/0434/5797/0328/files/catalogo_cedulas_do_brasil_download_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/6437/8022/files/32099817196.pdf
    • https://cdn.shopify.com/s/files/1/0432/3403/3824/files/aditya_hridayam_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/green_smoothie_for_life.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/fesedunewajefe.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/58525281927.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/xomiwutezanebawagafabin.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/wogatupixutiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/6580955374.pdf
    • https://cdn.shopify.com/s/files/1/0432/0129/8594/files/electronic_cables_and_connectors_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/balizajotinujagu.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_off0000882c.bin
9902ddab478522053d2e18278406905952d52b12e8e977687cf186fe4640fad7
pdf-font-stream PDF embedded font (sfnt) at offset 0x882C 5416 bytes
font_01_sfnt_off00009a52.bin
e9a5e4c64963f3844b8b59f5364e0465cc79bb7c950697f5289651cdc1be0dbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A52 10304 bytes