Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6b2d697c747bab…

MALICIOUS

PDF

59.1 KB Created: 2020-08-17 11:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13009821ceea19b435cf9bc51f336afb SHA-1: 6624a7dcf37bf0df0a4ad256a8780b66c006fc2a SHA-256: 5f6b2d697c747babe1de8ae44942a0f8b7e8f6accea23e35833db85dec43cb23
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged the document as malicious. The presence of numerous links suggests an attempt to create a link farm or distribute further malicious content, potentially as part of a phishing or SEO manipulation campaign.

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=mabinogi+spirit+weapon+feeding+guide
    • http://files.didntwakeupthisway.com/uploads/1/3/1/3/131379622/wofeziti_jalos.pdf
    • http://files.orikiritesofpassage.org/uploads/1/3/2/6/132681824/1b98e158b.pdf
    • http://wosatuma.myneosystems.com/uploads/1/3/2/6/132682883/kelitarexutinedupit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/allegra_gotas_bula.pdf
    • https://cdn.shopify.com/s/files/1/0429/3876/1379/files/joxunekegobuvesalav.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/vijofagifado.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4755/files/9239799005.pdf
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/problems_on_ages_questions_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/60872149876.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/65867354595.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/cardcaptor_sakura_tarot_cards.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34888362351.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/my_wifes_hot_friend.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/lepawa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/zezurorofigi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4296/1570/files/sensory_integration_activities.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_off0000a834.bin
c4acfd41c3106d1cd2506a1f65ed62355a426fbc0160b64493da5fd7de459867
pdf-font-stream PDF embedded font (sfnt) at offset 0xA834 5412 bytes
font_01_sfnt_off0000babd.bin
14e2c50dca80dd7dc6d0aba296968a70e51405ab26b1f5aeaab7351f17096a58
pdf-font-stream PDF embedded font (sfnt) at offset 0xBABD 10668 bytes