Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9705922b0c7b8d7…

MALICIOUS

PDF

42.6 KB Created: 2020-08-21 04:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a09e00ea74a48adb32208568af797e43 SHA-1: 6d26741660850f76ccd7334c164febfc60f64518 SHA-256: d9705922b0c7b8d7b471df3746595208804549404822b3b8f7dfe7501b8d3e67
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=freelance+designer+website+templates'. This URL is presented within the document body, disguised as a link to freelance designer website templates. The file also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering, luring the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=freelance+designer+website+templates
    • http://files.thehillcroft.co.uk/uploads/1/3/0/9/130969129/vipuxumad-pidawosadore.pdf
    • http://files.wisdellshomes.com/uploads/1/3/1/0/131070538/majiwujiru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesitoxerevujadutag.pdf
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/71813184125.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/callapp_premium_cracked_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/5802/0000/files/best_thriller_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9561/files/39938940264.pdf
    • https://cdn.shopify.com/s/files/1/0437/6018/9594/files/home_automation_technology.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/agency_cost_in_financial_management.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/fundamental_accounting_mcq.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f4d.bin
b2732a4a7dd68e839b2a608b2bb361f32e62b322c7b82e1c21ba48e60c41f280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4D 5580 bytes
font_01_sfnt_off00007228.bin
72a3fe65f0a21df30f240897224061cfa351088b80a4eb601fb5defb198ec993		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7228 2268 bytes
font_02_sfnt_off00007c39.bin
b6b4ac328acb6e68525467394fc5a70529097f54e8024d0345e9f3fafa9e7822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C39 9820 bytes

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