Malicious PDF — malware analysis report

Static analysis result for SHA-256 10484bda4dce0126…

MALICIOUS

PDF

44.3 KB Created: 2020-08-24 02:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6259562c06bed78bb8656efa6a7545fd SHA-1: 3404236292942939d687fa60b5ecdac48dcd7586 SHA-256: 10484bda4dce01266c3ca103a3f21cb837445fa6349a5fbb9d6e37a3c6e3413b
154 Risk Score

Malware Insights

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

The PDF document contains a link farm and a redirector to malicious infrastructure, disguised as a free live TV streaming app. The ML classifier strongly indicates maliciousness. The embedded URLs are the primary indicators of compromise, suggesting a phishing or redirection attack.

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=free+live+tv+streaming+app+for+android
    • http://files.allrosesfarm.com/uploads/1/3/0/7/130776204/684b68ff6897195.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/95350745984.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5719/files/43758041772.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/xedilasaxevuzixeresovekaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/degelewupogusajuxuteg.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2244/files/wevapenumuxeloji.pdf
    • https://cdn.shopify.com/s/files/1/0433/4675/5734/files/mapusesopebibob.pdf
    • https://cdn.shopify.com/s/files/1/0436/5415/2342/files/devefezizaki.pdf
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/dalunajamekepivub.pdf
    • https://cdn.shopify.com/s/files/1/0428/8013/9423/files/possessive_pronouns_worksheet_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/25876632532.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/lositofogewawopoxanovuxoz.pdf
    • https://cdn.shopify.com/s/files/1/0465/0221/5832/files/killers_movie_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12339474235.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_off00006f2d.bin
6a7b681c293e102a0dae62bafe49a511f665638c8870a34435de9ca5be7e0262
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2D 5376 bytes
font_01_sfnt_off00008168.bin
6d0f0130cb262d7a758a1ae1a310fbbcda5322c1769af0c16dea9d774f91d013
pdf-font-stream PDF embedded font (sfnt) at offset 0x8168 10032 bytes