Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b67921f9c7b3c52…

MALICIOUS

PDF

41.2 KB Created: 2020-08-24 06:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 925f8b1b115bef1d770c2513933ed34b SHA-1: 43fcccc3f12376d7b5219fab7ae29b658eb80b68 SHA-256: 1b67921f9c7b3c52d9ec39240b55fbe68efe4c2b560d86d565edd71dddadd037
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=energy+pyramid+worksheet+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute 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=energy+pyramid+worksheet+pdf
    • http://files.loveayianapa.com/uploads/1/3/1/3/131382955/4308416.pdf
    • http://files.coyleband.com/uploads/1/3/1/4/131438840/45babf0ea4e6ba9.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1187/files/29504948688.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/nagotawar.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/ncaa_basketball_court_dimensions.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/70401485933.pdf
    • https://cdn.shopify.com/s/files/1/0437/3974/2359/files/35508978238.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/totozovuwazux.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/relidevapejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/88016325336.pdf
    • https://cdn.shopify.com/s/files/1/0451/8959/5287/files/kawasaki_z900rs_performance.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/creative_brochure_design.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_off000061ca.bin
2065275dbabde15eeefd5563c403e097951ab095946bd2c892d1d7d2e8a46fb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CA 5640 bytes
font_01_sfnt_off000074e5.bin
4f07e903d3d639ca59e8081b4867d22ac91e7f9b2566033bd5244a1f7b0632e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E5 10364 bytes

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