Malicious PDF — malware analysis report

Static analysis result for SHA-256 6797c0b35106dde6…

MALICIOUS

PDF

41.4 KB Created: 2020-08-24 04:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30d3454cb8b087b3443abca60999be08 SHA-1: 3b488fcb8aeaa89903caf8a1cf13e2d912e31577 SHA-256: 6797c0b35106dde6cdae0dc92e6143993a629eb9deae5e572488ec48e319b63a
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=html+input+date+format+javascript
    • http://kurobamib.thefitferret.com/uploads/1/3/1/6/131607600/kenufoninodu.pdf
    • http://kukikugeb.currantcreekoutfitters.net/uploads/1/3/2/8/132814930/f73f8389cd84.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/rugagofipaloxewunikazubeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/7494/4153/files/jukopepawuxozekibonosix.pdf
    • https://cdn.shopify.com/s/files/1/0461/9275/4841/files/dedexaso.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6257/files/54756701873.pdf
    • https://cdn.shopify.com/s/files/1/0439/4234/6907/files/jan_cartoon_title_song_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0428/8839/6959/files/22640767837.pdf
    • https://cdn.shopify.com/s/files/1/0438/5076/0357/files/north_atlantic_gedmatch.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6117/files/sogusonugoti.pdf
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/ramefuzamonala.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/89169129264.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_off00006480.bin
2882dc3e982984d2de9fadf226c16ceb1d3341c5e0b83103448be265448c7f05
pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 5396 bytes
font_01_sfnt_off000076c0.bin
a34aa917880446741f8c699592d6e8390d45bfffd918959580d74e0548c8196e
pdf-font-stream PDF embedded font (sfnt) at offset 0x76C0 9908 bytes