Malicious PDF — malware analysis report

Static analysis result for SHA-256 0746a34d22bb1418…

MALICIOUS

PDF

54.8 KB Created: 2020-08-06 01:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1d0361f21046ac0e4797423fb660689 SHA-1: 3393f66451cef9bd939d41bcfc56682504e05ce4 SHA-256: 0746a34d22bb1418def9cd03c8be4090d7fa3a2ca2a4a8e5d2667ea3017e4146
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body and embedded link structures suggest a link farm or SEO poisoning tactic, aiming to drive traffic to malicious sites. The embedded link structure indicates a potential for JavaScript execution to facilitate redirection.

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=causes+of+indoor+air+pollution+pdf
    • http://files.mysterymeatpodcast.com/uploads/1/3/0/7/130739535/2961343.pdf
    • http://files.emagboosters.com/uploads/1/3/1/3/131398367/0a1d8f13.pdf
    • http://files.eyer-sherry-promotional-portfolio-2019-2020.com/uploads/1/3/0/9/130969761/pawazejufim_xomoki_kivap_jefab.pdf
    • http://tirisidit.firstbaptistnorfolk.org/uploads/1/3/2/6/132681504/3615750.pdf
    • http://files.belizehomesource.com/uploads/1/3/1/3/131380342/kejonepuwepokut_vabuzobajewut_pugekisan_doridakixuzijaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/mowazogupoki.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/sizisadunetuzelediri.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/a_force_a_pull.pdf
    • https://cdn.shopify.com/s/files/1/0437/0910/4279/files/basic_definition_of_electrical_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/72212946395.pdf
    • https://cdn.shopify.com/s/files/1/0434/9581/7382/files/64698311743.pdf
    • https://cdn.shopify.com/s/files/1/0437/9770/8957/files/36397869824.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/calendario_escolar_cyl_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/lol_hours_played.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_off00009a24.bin
5aad0d2a8b90c0d821d3bf80c6b906f237f88408c45407b7218a7dcc8fa32f47
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A24 4940 bytes
font_01_sfnt_off0000aafb.bin
136d5c9533dfff74e916b792e78e19c9629ba8dff29a1b101a10eebca95cc3e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xAAFB 10364 bytes