Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cef511c3a58f653…

MALICIOUS

PDF

46.4 KB Created: 2020-08-17 09:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41e02ee8e76f08d93a4640c3c1e2be31 SHA-1: ae851fc6fd73cea53a5f7dd11184c82f614d68d6 SHA-256: 1cef511c3a58f653e1ec1882532429474962cfef55ce9f622254c5a8b7a36b9c
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link `https://ttraff.cc/pify?keyword=format+y+axis+in+excel` leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic further suggests a large number of outbound links, many hosted on `cdn.shopify.com`, which are likely part of a link farm to manipulate search engine results or distribute malicious content. 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.cc/pify?keyword=format+y+axis+in+excel
    • http://files.bethelumcsi.com/uploads/1/3/1/0/131071256/buzejanavazewe.pdf
    • http://files.kisband.org/uploads/1/3/2/6/132681351/moregoxatamelad.pdf
    • http://files.birminghamwalkingtours.co.uk/uploads/1/3/2/7/132740873/0e29ab8316b183c.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/64445756050.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/88676854527.pdf
    • https://cdn.shopify.com/s/files/1/0441/1303/5416/files/lofixaloni.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/halo_effect_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6759/files/responsive_media_queries_for_all_devices.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/zaditewaxutununo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7682/6789/files/gradient_boosting_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/71057403907.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5290/files/how_do_you_calculate_isoelectric_point.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_off00007995.bin
a39d7207a9193ae983cf331e04149ed209f265945bf043ddea8ed0288d057939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7995 5072 bytes
font_01_sfnt_off00008ac9.bin
01d5d458e281cd61abbd95351edc89ed98cdfed35fbab673ddbd32eb74d37f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC9 10060 bytes

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