Malicious PDF — malware analysis report

Static analysis result for SHA-256 a153f9fc7687b120…

MALICIOUS

PDF

35.6 KB Created: 2020-08-26 11:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ec1b60ed1c2e840932060cc25713e09 SHA-1: 8d80aef79e9b72c3219b07c64f259ae62cfaed32 SHA-256: a153f9fc7687b120123cc64fbb149ca7f1017dee48013da9d58d078a211a33e4
150 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, pointing to ttraff.com. The document body, though heavily obfuscated, contains text related to 'Fallout 4 vault dweller's survival guide download' and the malicious URL, indicating a lure to trick users into clicking the link. The presence of numerous other links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=fallout+4+vault+dweller%2527s+survival+guide+download
    • http://files.petoskeymuseum.org/uploads/1/3/0/8/130814258/7060226.pdf
    • http://files.cure-sort.org/uploads/1/3/1/3/131379894/da66a80.pdf
    • https://cdn.shopify.com/s/files/1/0433/0648/3876/files/92795720322.pdf
    • https://cdn.shopify.com/s/files/1/0460/6001/1675/files/appareillage_brique.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/pimobimobu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/challan_form_no_32a_online.pdf
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/lab_attendant_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0460/0594/4487/files/heavy_metal_f.a.k.k._2_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0462/6179/7013/files/ccc_industry_trends_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/kabotijalexuwunijedidi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/18543525412.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/nopaturesoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7641/files/basic_electrical_engineering_book_by_abhijit_chakrabarti.pdf
    • https://cdn.shopify.com/s/files/1/0428/5621/8780/files/92661274011.pdf
    • https://cdn.shopify.com/s/files/1/0434/7206/0573/files/kipagevasediwaxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3638/4149/files/53811992944.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_off00004e26.bin
83ec90473d5f5da49d926560b982e744ffed17e354ace7fedeae0442ede9e0ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E26 5224 bytes
font_01_sfnt_off00006019.bin
0bd3523f32dea21a40a8faa13a6cab73fc4f3c022c3aaaf47611ac34348e7f3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6019 9808 bytes