Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f829e9467aec7c…

MALICIOUS

PDF

48.0 KB Created: 2020-08-11 23:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19f30cd5635c26e27899631b09d62034 SHA-1: 6c88a2d9a2b4e0f325133ba2dcbb8219900ad8bd SHA-256: 85f829e9467aec7cce0fae22c6801775608e07bd7838adc45dfff38e9bf3090e
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is disguised as a tutorial. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution.

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=vba+access+database+tutorial+pdf
    • http://files.flooringtradesales.com/uploads/1/3/1/4/131437699/4949445.pdf
    • http://files.sunmarketingsales.com/uploads/1/3/0/7/130739024/7595051.pdf
    • http://files.gatheringsemporium.org/uploads/1/3/2/8/132814427/nijemiladasiruz.pdf
    • http://files.playalamision.com/uploads/1/3/0/7/130776602/tenizumomojekegisi.pdf
    • http://jemep.thesocialscientist.net/uploads/1/3/2/8/132814930/7281460.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/equilibrant_force.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/mipuxumukubalekepud.pdf
    • https://cdn.shopify.com/s/files/1/0428/8646/3647/files/8682872122.pdf
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/fetch_post_request.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0814/files/fubefuxavabedevipula.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/kagifi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/8502453416.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/membrane_structure_pogil.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/dowesiguvif.pdf
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/data_lake_architecture_bill_inmon.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/is_mega._nz_safe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3733/files/xibat.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_off00007efd.bin
f5a102d1e277f2e0452f710c418ae21718b3157a6156f5ac4ce97001ba3e9ab2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFD 5252 bytes
font_01_sfnt_off000090e2.bin
683fc506231127eb5c3bb15c707f2acde0cb5d25d8ff3af6569174c238e59461
pdf-font-stream PDF embedded font (sfnt) at offset 0x90E2 10088 bytes