Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db25ec2d3129a2d…

MALICIOUS

PDF

37.3 KB Created: 2020-07-10 13:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f72ee6a5124392619d1e003d8877d1d SHA-1: 0bdaf5e6893f63cf01e5ec9449c0ad1ec5e0db63 SHA-256: 0db25ec2d3129a2dab5a552992d22903c49c6f09c4ee5338bb2e364d47c5d6e3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One of the primary links, 'https://ttraff.cc/wb?keyword=forecasting%20volatility%20in%20the%20financial%20markets%20pdf', is flagged as a malicious redirector. 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.cc/wb?keyword=forecasting%20volatility%20in%20the%20financial%20markets%20pdf
    • http://files.missjordansclassroom.com/uploads/1/3/0/7/130776841/5406440.pdf
    • http://files.naturaltreatmentjointpain.com/uploads/1/3/1/4/131409909/tipedulid.pdf
    • http://files.brewerstreetfarmhouse-weddings.co.uk/uploads/1/3/0/9/130969552/d2897c68.pdf
    • http://files.jyothischool.com/uploads/1/3/2/7/132711965/c45f672869f4c2.pdf
    • http://files.amazingcreationstaxidermy.com/uploads/1/3/1/1/131163953/fukamedolotisutizif.pdf
    • http://files.coastalbenddistillingco.com/uploads/1/3/1/1/131164047/kejiwenolevixipuwof.pdf
    • http://files.stephendalzell.com/uploads/1/3/1/3/131379815/ruvoguvezomusu.pdf
    • http://files.blmslibrary.org/uploads/1/3/1/6/131606644/ebdfe5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://zividiket.files.wordpress.com/2020/07/fefiwowijepiwopidu.pdf
    • https://zosikex.files.wordpress.com/2020/06/gajamum.pdf
    • https://sepozux.files.wordpress.com/2020/07/93940059135.pdf
    • https://jakasizox.files.wordpress.com/2020/07/muzew.pdf
    • https://zafujuzokud.files.wordpress.com/2020/06/daladajizazedaneg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/lobuzegegamojum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.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_off00005334.bin
7d0fbfadf0bfa53ba5b8ca9fcad5cabdaafd9947ea66d2c5f569a8c870c34781
pdf-font-stream PDF embedded font (sfnt) at offset 0x5334 5540 bytes
font_01_sfnt_off000065d9.bin
62dce52b6dbaa39b606a16ca1f9c6ba1341bf9e621ef07008800467ef06964a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D9 9980 bytes