Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4df43edc6c405c…

MALICIOUS

PDF

49.2 KB Created: 2020-08-11 18:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6352cb538332311349c52627893a7f0c SHA-1: 1bb0d5cc4b6c13ce13170ee770daf6c0f8b3cb42 SHA-256: 1d4df43edc6c405cefc7f613d21b996f09972cbd6a62b525381236ad1c6eb3a6
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains, likely for SEO manipulation to increase the visibility of the malicious redirector. No scripts were extracted from this sample.

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=geometrical+isomerism+notes+pdf
    • http://kixadazin.tanradio.net/uploads/1/3/0/8/130874457/nuvodo-nobazoxesabe-vumobepufeku.pdf
    • http://files.laurabrownauthor.com/uploads/1/3/0/9/130969148/xudagejasu_lagowujuf_dibobexu_womedetar.pdf
    • http://files.bolddiscipleship.com/uploads/1/3/2/3/132302816/c41c43.pdf
    • https://cdn.shopify.com/s/files/1/0447/1973/4938/files/music_an_appreciation_8th_brief_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/3817/8470/files/decision_making_and_problem_solving_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29025511016.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9866/files/jeragunewis.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5755/files/95959992613.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/el_problema_del_alcoholismo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lujodegiduwidixerilaji.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/voxiwetimadetalex.pdf
    • https://cdn.shopify.com/s/files/1/0433/6612/1623/files/pewugos.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/kebemanuvaku.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_off00008253.bin
6c2a3904dd8c658a9f5c90b60ae016cc5f9728b2dc073213d8eae53ec6035add		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8253 5332 bytes
font_01_sfnt_off00009457.bin
8c436c2871bbd30dee6832f40b1e58887e024667373252b5d3797576fc0274f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9457 10472 bytes

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