Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a3c31eadb1959f…

MALICIOUS

PDF

70.8 KB Created: 2020-12-03 22:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0b7e84d81880eab2b150608f577943b SHA-1: 5968681275f122d09c809d2c7a0269cf22ba7b8b SHA-256: a5a3c31eadb1959fa2b55ee5041db3efab3aa73a4b021a1a64e0ef445858c5d6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. The primary URL, 'https://traffking.ru/123?utm_term=miller+heiman+strategic+selling+ppt', indicates a potential lure to a site that may host malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and extensive linking are indicative of malicious intent, likely to drive traffic to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?utm_term=miller+heiman+strategic+selling+ppt
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8b205b13fec.pdf
    • https://xinotojopafexiz.weebly.com/uploads/1/3/4/3/134316842/9592541.pdf
    • https://xapefawisago.weebly.com/uploads/1/3/4/7/134771693/0b44b290e63.pdf
    • https://cdn-cms.f-static.net/uploads/4483854/normal_5fbacde254fed.pdf
    • https://rusopanuguxixat.weebly.com/uploads/1/3/4/6/134640346/7906924.pdf
    • https://cdn-cms.f-static.net/uploads/4464734/normal_5fbc3301bc96a.pdf
    • https://cdn-cms.f-static.net/uploads/4453332/normal_5fc2bbf22bf36.pdf
    • https://cdn-cms.f-static.net/uploads/4460076/normal_5fad832d8efc8.pdf
    • https://cdn-cms.f-static.net/uploads/4414332/normal_5fa0226a35ba0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe02c818e72e5fdb9d756a/1606288073085/17359736241.pdf
    • https://s3.amazonaws.com/bulalowisu/17551408210.pdf
    • https://s3.amazonaws.com/woxojuxafopuv/26480478195.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2ef.bin
9d4d5110f8ec1248613a73c888a2e8519a4622f8b687eed4ba898d8cf6c66c5f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EF 5352 bytes
font_01_sfnt_off0000d500.bin
757b342464e81dac34aa845e8d01bbd114309de45411764a092ee43d39a77342
pdf-font-stream PDF embedded font (sfnt) at offset 0xD500 10608 bytes
font_02_sfnt_off0000f926.bin
0865ea5686e30d19842a941efae749c2e92da649021023aa876fc32c67f43dd0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF926 16232 bytes