Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b1e6332d82f966…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 17:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab486f673b9a8163330ee11a5d92f881 SHA-1: 0d16def723462106d966fb75d2bbeae80f8970a8 SHA-256: e4b1e6332d82f96666bc9fc5a3937d64da18901f3aead04029141f160f3fe45c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=bug+report+format+in+excel+sheet`. This link is presented within the document body, disguised as a bug report format in Excel. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware distribution site.

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=bug+report+format+in+excel+sheet
    • http://files.iampaper.com/uploads/1/3/1/3/131383323/7661406.pdf
    • http://vewojuvo.backpackconnections.com/uploads/1/3/0/9/130969634/sinaluwazomizuse.pdf
    • http://files.bettyleaphotography.com/uploads/1/3/1/1/131163851/fe9693cedf5f7.pdf
    • http://zasadapum.holdenshouseco.com/uploads/1/3/0/7/130775519/3a78a7dedf9006b.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/16461247474.pdf
    • https://cdn.shopify.com/s/files/1/0438/3178/7670/files/o_ceticismo_da_f_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/echo_dot_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/83804166140.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/pulse_amplitude_modulation_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/pafim.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/zagedowuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/schwerbehindertenausweis_antrag_nrw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8565/files/que_es_un_abono_organico.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/girotimovu.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_off000063f7.bin
4b76c8e92845dfc108bdb76181924b9ed809817ed6dd7cc45de5e1c5114f8595		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F7 5544 bytes
font_01_sfnt_off000076aa.bin
5d15d1ae504d36dbd2fede059037ab35d5ceaee4d15dee72b9a20ba80305c272		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AA 9832 bytes

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