Malicious PDF — malware analysis report

Static analysis result for SHA-256 50bbdb0da2d58f69…

MALICIOUS

PDF

46.0 KB Created: 2020-09-01 15:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab396682f16242958800fd1cae27b739 SHA-1: 75253d66483edb016b5169af27022a59bbfde7e4 SHA-256: 50bbdb0da2d58f6962fbcd5143768473bb4ec5069dd5e109d43b8162fcb6a7d7
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as an audio converter tool. It also features a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to increase visibility. The presence of a download button lure further supports a malicious intent to trick the user into clicking the malicious link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=audio+format+converter+online+free
    • https://cdn.shopify.com/s/files/1/0463/7402/7419/files/99494216210.pdf
    • https://cdn.shopify.com/s/files/1/0434/3667/1132/files/joker_movie_meme_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/vozaxiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/5059/0627/files/calamari_steak_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/doporetazogoxojuruk.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/4853282456.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/15367526412.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8864/files/38123676314.pdf
    • https://static.usrfiles.com/ugd/253000_33e4ce1661a2474d8539b6a56c854fd4.pdf
    • https://static.usrfiles.com/ugd/e78b77_86c38a3323884c6485f0959deac367e0.pdf
    • https://static.usrfiles.com/ugd/97634b_f14420a0a856468184e1e7de83c06ef0.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_e6eadfda5c7a410d91998ee86d0ff73a.pdf
    • https://static.usrfiles.com/ugd/544c7e_1c3d48f5cda749aca73e9c7cd482f7c4.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_off000077d6.bin
637c76b4bfb46ef8d51db08559a27902737d125f0f84fc78997be7736b255047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D6 5040 bytes
font_01_sfnt_off000088e9.bin
ad72543b2933a664a37142dfff742450265c0835b7e9f59032b70d913208a95c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E9 9940 bytes

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