Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03e06d7d354bccc…

MALICIOUS

PDF

39.9 KB Created: 2020-08-20 01:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26d1b68096cf11487e0264ae4419d074 SHA-1: 5a26872b0fd69ba841658b73bf6749e8cb51945e SHA-256: b03e06d7d354bcccb432831f00aa3c8ba2ab44777bcf14d764e017d4717b9249
154 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.ru/pify?keyword=swimming+goggle+lenses+color+guide'. This URL is embedded within the document body, disguised as a guide. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering, tricking the user into clicking the malicious link.

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=swimming+goggle+lenses+color+guide
    • http://kapive.estimatingsolutions.net/uploads/1/3/0/8/130814297/donaj_nivinoxevav.pdf
    • http://jadivobaj.thesarahenni.com/uploads/1/3/1/4/131454165/gijogobominoratu.pdf
    • http://files.mca.school/uploads/1/3/0/8/130814749/tivagalutonevob_rulakezosagizu.pdf
    • http://xopomar.keepmelovely.com/uploads/1/3/1/4/131453645/7146887.pdf
    • https://cdn.shopify.com/s/files/1/0435/6784/1443/files/visiwaxilari.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7746/files/advanced_engineering_mathematics_10th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0450/4210/6518/files/actualit_socio_conomique_en_afrique_francophone.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/enciclopedia_de_aperturas_de_ajedrez_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/ritowapadanoniwupori.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/72884114304.pdf
    • https://cdn.shopify.com/s/files/1/0432/8361/1801/files/nowejudovukexakigul.pdf
    • https://cdn.shopify.com/s/files/1/0435/7043/0115/files/ex-_cell_pressure_washer.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/77207161416.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_off00005d09.bin
6dcb5c5cd388fe930dab583ab149ffe510921b3a65761456b6c7ca8b7ed5a5e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D09 5244 bytes
font_01_sfnt_off00006ecf.bin
311674c26b810902f3c1ed89df4ae9a920a94de709a1eb195edc53510b936c88
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECF 10556 bytes