Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17c8eb280a29441…

MALICIOUS

PDF

45.0 KB Created: 2020-08-15 00:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd684c06a8e070c0dec8814245cb26d6 SHA-1: d8a1071ee6a54d8bc14537ea03762b483452db9f SHA-256: f17c8eb280a2944188148141265fa55f187866de3d04c50b3efc0cf580e7c7af
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=baroness+amos+report'. Additionally, it features a PDF link farm with numerous URLs hosted on cdn.shopify.com and other domains, indicating a potential SEO poisoning or link distribution tactic. The ML classifier strongly supports the malicious verdict.

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=baroness+amos+report
    • http://tibanu.houseofmusick.com/uploads/1/3/2/7/132740720/9037886.pdf
    • http://xalafuv.rachelsroberts.com/uploads/1/3/1/4/131407630/6376248.pdf
    • http://files.goshenmechanical.com/uploads/1/3/2/6/132696171/9497673.pdf
    • http://files.hoofandshoe.com/uploads/1/3/1/4/131406736/7219369.pdf
    • http://files.thephotomender.com/uploads/1/3/0/7/130776673/bafifobexazup_woxusoduwemeb_widuvanedel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/bash_yaml_parser.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0976/files/pinizegatuvujofezuluz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2289/2711/files/xopewonugiga.pdf
    • https://cdn.shopify.com/s/files/1/0440/2233/3605/files/55108427289.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44329390643.pdf
    • https://cdn.shopify.com/s/files/1/0453/3600/2715/files/44468402081.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/mumabuketefurozanivo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7413/9813/files/67146380461.pdf
    • https://cdn.shopify.com/s/files/1/0437/5343/9383/files/95304679419.pdf
    • https://cdn.shopify.com/s/files/1/0433/3030/6203/files/fifakopiwajurav.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/cause_and_effect_worksheets_7th_grade.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073dd.bin
c33af5900ce15939e244f42a8ebb2c70c21c3eda5f7b9b0efdad9eff25ed398e
pdf-font-stream PDF embedded font (sfnt) at offset 0x73DD 4980 bytes
font_01_sfnt_off000084b2.bin
de034ce45e7b67764bb8d0eb50365a3bdc3f7a199b0fedb98eb275fef610500d
pdf-font-stream PDF embedded font (sfnt) at offset 0x84B2 10244 bytes