Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fe8a9ce83f98e6…

MALICIOUS

PDF

41.8 KB Created: 2020-08-12 08:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6752a7a402dacfed7c0d0ee2c90ef9e3 SHA-1: c42f6bb7eca9afb5ed4607cf7d2e0f21dd6ee69e SHA-256: 20fe8a9ce83f98e63edbe6b81e46bf9e616cbea1b875581275119e595093f477
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm to obscure the true malicious destination. One critical heuristic firing indicates a direct link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect users to potentially harmful content.

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=neil+degrasse+tyson+astrophysics+in+a+hurry+pdf
    • http://files.henkvantwillertandventodonorte.com/uploads/1/3/1/3/131383544/xebosaxuparaj_xatetiwidaju_jewigo_samebelek.pdf
    • http://files.idabees.org/uploads/1/3/2/6/132681767/makumejen_dulivab.pdf
    • http://files.jakegrahamphotography.com/uploads/1/3/1/3/131381003/57b7755a6c10.pdf
    • https://cdn.shopify.com/s/files/1/0433/4397/0463/files/687052163.pdf
    • https://cdn.shopify.com/s/files/1/0438/9961/7448/files/kokasubazufegikimuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/fijupexoxezev.pdf
    • https://cdn.shopify.com/s/files/1/0449/3757/6603/files/south_african_national_anthem_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/kikiri.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/39840404354.pdf
    • https://cdn.shopify.com/s/files/1/0443/5614/1212/files/how_to_pull_branch_from_github.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/monumegasuwipijuzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7959/files/22771389305.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/xutedijopozoburixurupeji.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/welivuloduwad.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_off00006081.bin
3902bb5b1678a49b96f275d35bd88721eaed4e7528f2a6ce3df8a5197fa3e191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6081 5488 bytes
font_01_sfnt_off0000732a.bin
84bcc012fcd1d1461288bf7a4d00d29d6e4c995d2bca947f0c40c20425464978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732A 13436 bytes

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