Malicious PDF — malware analysis report

Static analysis result for SHA-256 6680266a3e9fb3b1…

MALICIOUS

PDF

39.8 KB Created: 2020-08-28 08:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c3703d052ac8de0b33ab5459c36391b SHA-1: 0a53faa45446f5ce4593222b857e69f429c5eada SHA-256: 6680266a3e9fb3b118cf06e94c5eb635ca63378c5e9c16dacdd804daef3535a2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged the document as malicious. The embedded links likely serve to distribute malware or lead users to phishing sites, masquerading as legitimate 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.com/pify?keyword=biological+anthropology+concepts+and
    • http://litepapu.thesovereigntymovement.com/uploads/1/3/1/4/131407005/suwepifitusuv-watimuw-tagemizos.pdf
    • http://lenodoza.jonesparkview.com/uploads/1/3/0/9/130969699/7654302.pdf
    • http://files.uniarq.net/uploads/1/3/1/4/131453610/2996340.pdf
    • http://kedasijaw.travelwithkara.com/uploads/1/3/2/6/132681352/dufuwifipenasus.pdf
    • http://wiwofogo.rosaferrara.net/uploads/1/3/1/4/131437532/ganajeso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1131/7658/files/counterfeit_drugs_statistics_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/vonizewotiwukawobet.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2394/files/53908446356.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/lidevugekawosigudolezavo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1629/8393/files/project_on_polarization_of_light_for_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0450/9886/0707/files/rirukuxokafesaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://cdn.shopify.com/s/files/1/0431/2655/4781/files/46781030056.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_off00005d28.bin
184c26a0297e487edc3a44ac5d9cdb8564e2ac3c71a36fc988d38da505401733
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D28 5488 bytes
font_01_sfnt_off00006fc5.bin
6b6c71ffa18dec534bf0be157391ce90d9f5c3564891bd680f908694df83d337
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC5 10128 bytes