Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6fd60d33179bcd…

MALICIOUS

PDF

33.8 KB Created: 2020-08-01 17:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a22ebb7895c48a5ba634cf6a1cc0d48c SHA-1: d196b8d8d3405c0445434ba105c434c272de3bf5 SHA-256: 5f6fd60d33179bcd73f0e88bffa31cfd6b3526c97dccb77c1422ffa8f1fd98f4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or leading users to phishing sites. The document body and heuristics indicate a lure related to 'engineering mechanics dynamics 6th edition pdf', likely to entice clicks. The presence of numerous external PDF links further suggests a link farm designed to attract traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=engineering+mechanics+dynamics+6th+edition+pdf
    • http://files.seedsolutionsseedlabs.com/uploads/1/3/1/8/131856270/1205431.pdf
    • http://files.oldpaintlickcemetery.org/uploads/1/3/1/6/131637081/xuwolep.pdf
    • http://files.virtuousink.net/uploads/1/3/0/7/130738725/f2c83d3e96f.pdf
    • http://files.rileysportsequipment.com/uploads/1/3/2/7/132741476/gofenofesi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42257023754.pdf
    • https://cdn.shopify.com/s/files/1/0431/1924/7514/files/2184589845.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/jofot.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/rigimamutovarubek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/lesojiridepulagobubu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6040/3103/files/xurasafamegogu.pdf
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/welizobalugusasifev.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/93112495491.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045fd.bin
54853d41c8c1a90ac6fac04e03827d17b38bed8b81d906cf714948fa2e807d0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x45FD 5752 bytes
font_01_sfnt_off00005978.bin
36762578793e8017ee6a88c942ae7fb67d046bd32396ef90f804072e7cd237ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5978 9680 bytes