Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b79c8293d960478…

MALICIOUS

PDF

38.5 KB Created: 2020-08-08 03:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63df857d5fa75eb9a1fa0993d22c5004 SHA-1: f4cc8d8185e29176e2a18d991e6f5eb5f921850c SHA-256: 5b79c8293d960478e70a589e18f0112ff9c89f22f097feb914eb8dc7a7396895
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to potentially malicious infrastructure. The primary redirector URL identified is https://ttraff.ru/pify?keyword=birdland+bass+transcription+pdf. While many of the Shopify links are benign, the presence of the redirector and the sheer volume of links suggest a malicious intent to drive traffic to undesirable destinations.

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.ru/pify?keyword=birdland+bass+transcription+pdf
    • http://files.autoservicearlingtontx.com/uploads/1/3/0/7/130775001/botogoniwizav.pdf
    • http://files.allexishollandphotography.com/uploads/1/3/1/4/131453432/20d75657.pdf
    • http://xaweg.whiteroseultra.co.uk/uploads/1/3/0/7/130775162/be71d5fbdac47.pdf
    • http://dusutivi.andygibsontv.com/uploads/1/3/0/8/130874284/5579651.pdf
    • http://favaz.sarahcooney.org/uploads/1/3/1/6/131636948/e2e77a8e0adb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0741/6219/files/crimson_and_clover_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/80625166467.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41448402009.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/21015977240.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/96533216883.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5694/files/43606966599.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/44755495987.pdf
    • https://cdn.shopify.com/s/files/1/0437/6100/8791/files/42326610549.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/anthony_robbins_unlimited_power_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/1448/0287/files/14038340601.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_off00004f4f.bin
6a311a9bb5d3c01c98efdc3a633c993bd7f974e840377aac622370837121c47f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F4F 5336 bytes
font_01_sfnt_off0000617d.bin
c2050cff7c9e9e48177092e859188bdff13109f412004b93d0a08d7fe8a9cf4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x617D 13096 bytes