Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ffc748185cb87e2…

MALICIOUS

PDF

49.8 KB Created: 2020-08-05 22:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba701b66b0b51b32b4896c5f81a6b336 SHA-1: 973ded048cc0c35ce03d124f4ff4b9845855913a SHA-256: 4ffc748185cb87e2548ce1bf2e22e5eaf7fdcc9281957865faab92a34c468f71
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/pify?keyword=seductive+storytelling+pdf'. Another critical heuristic identified a PDF link farm, suggesting a broad distribution attempt. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains references to the redirector URL and appears to be a lure for content related to 'seductive storytelling'.

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.ru/pify?keyword=seductive+storytelling+pdf
    • http://files.riversofthekingdom.org/uploads/1/3/0/8/130874123/956c4.pdf
    • http://files.melissashowers.com/uploads/1/3/2/7/132740399/1333731.pdf
    • http://files.pacetrailseries.com/uploads/1/3/1/4/131407802/detuxipamipodefi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5550/4795/files/sozujamedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/medwatch_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/29836981861.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9382/files/ruruvomerexagare.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/selarotigaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/28073709150.pdf
    • https://cdn.shopify.com/s/files/1/0440/5483/9461/files/gsm_based_vehicle_tracking_system.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/business_plan_for_startup_company.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/79151691975.pdf
    • https://cdn.shopify.com/s/files/1/0433/9141/8518/files/44635457476.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33435760041.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_off00006e7d.bin
a0b0f69ca30db05adcfb275979a4141caf69969fc2ebeda2a3e9d5f50a394864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7D 5380 bytes
font_01_sfnt_off000080ed.bin
cba45ec90c48afaba5fd9b66ae01b06cece5858b38762c2d9754fc4ebc359f03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80ED 10384 bytes
font_02_sfnt_off0000a4b9.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B9 16312 bytes

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