Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad802f7c53d846a…

MALICIOUS

PDF

40.8 KB Created: 2020-08-19 16:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce93ba4b12020a59f47f15a46216f5af SHA-1: 9c4f05217fa542b1ac10b9823012533a92b03ea5 SHA-256: 5ad802f7c53d846af17923871eedd8bead16e0568f40cfc461eb7e3c4368cf01
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector, suggesting an attempt to lead users to malicious content. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains text related to 'company logos quiz ppt free' and the malicious URL, reinforcing the lure. The presence of many external links, including to Shopify, indicates a link farm strategy to potentially improve SEO for malicious content.

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=company+logos+quiz+ppt+free
    • http://files.thefeltfactory.co.nz/uploads/1/3/0/7/130776841/xizixexa-dajawotubep-fekifomidele.pdf
    • http://files.senalista.com/uploads/1/3/1/4/131411474/dogagojevifu_pumubeb_rewejotopuzodum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/39872691209.pdf
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/38039433882.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/72325102147.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/5039576275.pdf
    • https://cdn.shopify.com/s/files/1/0436/1001/3853/files/bodiviwuzug.pdf
    • https://cdn.shopify.com/s/files/1/0432/4691/1643/files/eagle_scout_letter_of_recommendation_example.pdf
    • https://cdn.shopify.com/s/files/1/0447/5797/5191/files/vadoguro.pdf
    • https://cdn.shopify.com/s/files/1/0438/9486/6088/files/padewaperolokiwinejana.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdf
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/wozupubifuta.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/bogerewum.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_off000060f8.bin
11fcfa9f6ca5445a227c635c630fad2924765157b8f1ee89363011504f7a3d21
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F8 5404 bytes
font_01_sfnt_off0000734c.bin
944106da4464150265043760f4284f16f3c14d46aa4722138800edf6acdc10a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x734C 10548 bytes