Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67bf6e4e1482d61…

MALICIOUS

PDF

41.8 KB Created: 2020-08-25 12:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 479aca0fab70bee2e9c63c9e283f9962 SHA-1: 61bb4d36d9a17cdaa39c0aece4aa8a395d0d1169 SHA-256: b67bf6e4e1482d61f1d867d30b45caab1e8730cd7df5f727e4213c0bf3ffe145
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on various domains, including a known malicious redirector at 'ttraff.ru'. This indicates a link farm strategy designed to direct users to malicious content. The document body itself is heavily obfuscated and contains the malicious URL, further supporting the redirection attempt.

Heuristics 3

  • 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.
  • 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=apprendistato+professionalizzante+obbligo+formazione+esterna
    • http://pilon.petfirstwalkersnsitters.com/uploads/1/3/1/4/131438873/jelukugojijuxa.pdf
    • http://lokubo.susanmerrillsquier.com/uploads/1/3/1/1/131163664/bazosuj_tesabapune_jorepusojikagom_sukilebebal.pdf
    • http://kagon.easytobuyahouse.com/uploads/1/3/1/3/131379803/raxexobina-vodegobi-doranimo-jikakudati.pdf
    • http://files.archikal.com/uploads/1/3/0/9/130969472/zazuvedot.pdf
    • http://files.cookiesnobcrochet.com/uploads/1/3/1/0/131070367/ba3c10a2868aa68.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/titumaxigitaxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/46344584645.pdf
    • https://cdn.shopify.com/s/files/1/0428/6093/7382/files/liralanovumilugit.pdf
    • https://cdn.shopify.com/s/files/1/0432/6798/1476/files/94884744366.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/86699805993.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/13735739399.pdf
    • https://cdn.shopify.com/s/files/1/0433/1841/1417/files/15771377065.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/lumad.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/splash_screen_animation_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0428/4914/0902/files/76699572553.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_off000064ca.bin
42aecd95917786a89fd6d2ac04ba031ac6f0e54c9da1de20728b7713591b71e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CA 5540 bytes
font_01_sfnt_off00007785.bin
7b25f7dd9b32295536cb817e607d73d85688542c2af96f343ca401d355e598a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7785 10532 bytes

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