Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1537af93cb990c…

MALICIOUS

PDF

43.9 KB Created: 2020-08-03 19:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7b027aebbd03493d5c3f21947761d2f SHA-1: 46f4d018a95e6230050a788f3c76b17479edd4fd SHA-256: 6b1537af93cb990c4a73fa51f6634ae3cbd0f0876b113d1d7a2bb926d554d973
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious due to its structure, which includes a large number of embedded links pointing to external resources. The primary link, 'https://ttraff.com/pify?keyword=angielski+w+t%25C5%2582umaczeniach.+sytuacje+pdf', is identified as a malicious redirector. The document appears to be a link farm designed to direct users to potentially harmful websites, masquerading as a document about English translations.

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=angielski+w+t%25C5%2582umaczeniach.+sytuacje+pdf
    • http://files.sendatsu.com/uploads/1/3/0/9/130968996/sagowatogoboje.pdf
    • http://files.paynedesignbuild.com/uploads/1/3/1/3/131379194/fovubap_patetobo_fapusaka_metoxisodes.pdf
    • http://files.montessorihossegor.com/uploads/1/3/1/8/131859261/kigamom-foxeberuzup-gafejamobo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/75610755684.pdf
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/79354366091.pdf
    • https://cdn.shopify.com/s/files/1/0430/7314/2935/files/xujadizovarikogulo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/11149068315.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/parutusefapefasajif.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/samadebawopinunuxigugefil.pdf
    • https://cdn.shopify.com/s/files/1/0436/5431/6197/files/wowusisodenopomizesal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/71122794142.pdf
    • https://cdn.shopify.com/s/files/1/0430/7707/5108/files/92301206372.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/xusixenasek.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_off000066b8.bin
a2e0aa1272d92a9094879543174f791eec6813428e0760aa40f6c1cc9f42dd17
pdf-font-stream PDF embedded font (sfnt) at offset 0x66B8 5932 bytes
font_01_sfnt_off00007b03.bin
e2b2de8e1a68037a261d140611d8b1cf3a92271e0203b3408d0384607bdc185d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B03 11804 bytes