Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21c67fbee2782d7…

MALICIOUS

PDF

34.4 KB Created: 2020-08-21 18:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 690eeac6cefa7419fa262bd829e08361 SHA-1: a9bd3a22532f77b685d6107e097e84cba2fe3727 SHA-256: b21c67fbee2782d7f079ad575341796ceafe97381ef24f690fd0c13ff3707fc9
120 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.ru, which is disguised as a link to a Bengali movie. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to Shopify-hosted PDFs. No scripts were extracted from this sample, but the presence of the malicious redirector and the link farm structure strongly suggest a phishing or malware distribution 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=bengali+movie+bondhu+hd
    • http://files.fhbcofhartsville.org/uploads/1/3/1/6/131606874/gedinala_sesatuvu_sebuwavin.pdf
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/94984001394.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/67821137605.pdf
    • https://cdn.shopify.com/s/files/1/0438/4918/7493/files/lewezuzogiwiva.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/bexanenenodunezekik.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6887/files/7477539875.pdf
    • https://cdn.shopify.com/s/files/1/0434/7179/8436/files/16197174181.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/imagine_dragons_night_visions_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/ap_calculus_limits_and_continuity_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5778/2690/files/chick_fil_a_application.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1699/files/works_cited_mla_format_owl.pdf
    • https://cdn.shopify.com/s/files/1/0434/4666/5382/files/69193163023.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_off000049d5.bin
0125bfe7ac9b34a11ae905b0140de894191847b3e67700ca438bc7b91abf1ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49D5 5216 bytes
font_01_sfnt_off00005b6c.bin
9f9a9ded61c8faa44705731062118527242800a43c8c3996466fafc5b3d5d418		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6C 9888 bytes

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