Malicious PDF — malware analysis report

Static analysis result for SHA-256 008b645f516e2b7c…

MALICIOUS

PDF

35.8 KB Created: 2020-08-20 07:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c33c230ee9c39ca7e06f1c300b7088c SHA-1: e5d46e6bb0f72aed231e4afbb99caaef53dc674a SHA-256: 008b645f516e2b7c30be21906f80b704144b3ff24f952069414d93d90e104cd5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document body and embedded link structure suggest a lure related to 'Cortana win 10' to entice clicks. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious redirector.

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=cortana+win+10
    • http://files.anstedwv.com/uploads/1/3/1/1/131164479/mowezodukeve_niliv_sijufijedulor.pdf
    • http://files.jchambersconstruction.com/uploads/1/3/1/4/131483327/7c4b11704566.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/genapinakerijepi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/kubuwoga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetitoditasenubekuxon.pdf
    • https://cdn.shopify.com/s/files/1/0439/9998/5822/files/kaziwakekevo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/bouncin_on_my_dick_tyga.pdf
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/16419615914.pdf
    • https://cdn.shopify.com/s/files/1/0437/9285/9293/files/missing_you_1st_ladi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/xezeluramapigodamonuxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8694/5187/files/13686028869.pdf
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/informatica_command_line_reference_10._2.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/far_cost_principles_guide_2017.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/statista_e_commerce_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/4058408862.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9245/files/transport_processes_and_separation_process_principles.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_off000051dd.bin
abc766894fc8000a91e80cb5b3baa9cd429d7ea1c3e0cad29a672eeca8a20b10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51DD 4660 bytes
font_01_sfnt_off000061ce.bin
9e1fd9aee8adb4d292780acd31fae8a333905467f74164f07212558ba88d5072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CE 9764 bytes

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