Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d510efaf5e17ad…

MALICIOUS

PDF

48.1 KB Created: 2020-08-23 08:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 580913d512826ee4b7ce77646a191532 SHA-1: 785107281f31736c54f12a99c34bb5a1f2a9abaf SHA-256: a8d510efaf5e17ad96aff92415203e89b8c8be5512b84c924aba34d6f2718b99
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=balancing+chemical+equations+worksheet', which is flagged as a malicious redirector. The presence of a 'Download Button' heuristic further supports the lure-based attack pattern.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=balancing+chemical+equations+worksheet
    • http://begupu.newwoodturners.org/uploads/1/3/2/7/132740267/zoboregekalamojaba.pdf
    • https://cdn.shopify.com/s/files/1/0437/2342/3912/files/penulabuguwutip.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6351/files/26761391286.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/pafuvavarefat.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/chevy_cruze_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4655/1208/files/6th_grade_math_ratio_tables_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/7872/9374/files/dubotosowigif.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1749/files/67622203552.pdf
    • https://cdn.shopify.com/s/files/1/0437/4459/2021/files/gadabivanut.pdf
    • https://cdn.shopify.com/s/files/1/0463/1533/9938/files/difuvefitejid.pdf
    • https://cdn.shopify.com/s/files/1/0431/1790/4039/files/wojikusadudaxibokanalawo.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_off000072c3.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C3 2828 bytes
font_01_sfnt_off00007cbd.bin
730e8925fb04e4ea3270e758af431127d78ac8eabc97cb6ea543eed60c96a331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBD 5544 bytes
font_02_sfnt_off00008f73.bin
70d576ffbaec3d5a35da8b300efd02d6218fd550bd4dca0e4b656374bc51aa29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F73 9924 bytes

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