Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6dcb9b1ad72304f…

MALICIOUS

PDF

45.4 KB Created: 2020-08-06 13:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a5c47434366a233249db2a34641e258 SHA-1: a6cbec8feb96a4d97117dd12367b91f116c1f256 SHA-256: a6dcb9b1ad72304f55b16b076742189ec7f99b987a7c4899899f38cdac330e7b
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 external sites. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=phylum+porifera+characteristics+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to this malicious site. The presence of numerous other links, many hosted on Shopify, further supports the link farm attack pattern.

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=phylum+porifera+characteristics+pdf
    • http://files.writingandrhetoricmke.com/uploads/1/3/1/4/131437623/ludixa-wegunogaja-vokuxe-dovizip.pdf
    • http://files.paqu.org/uploads/1/3/1/8/131871894/vibofukupu_ruzererijolibij.pdf
    • http://files.girlsforgod-gfg.com/uploads/1/3/1/6/131636664/1101874.pdf
    • http://wejubelu.nostyxorstonesdanceacademy.org/uploads/1/3/1/4/131407089/17ae3.pdf
    • http://files.meerakaulfoundation.com/uploads/1/3/1/4/131407823/41eff71.pdf
    • https://cdn.shopify.com/s/files/1/0429/0392/8991/files/dungeons_and_dragons_player_s_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6124/files/sozibufewanud.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/59318111966.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/dubiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/90980838332.pdf
    • https://cdn.shopify.com/s/files/1/0433/8024/4643/files/ganofidirafuzalogi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5221/1099/files/53502986680.pdf
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/animal_cell_and_plant_cell.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/anatomical_nomenclature.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/zimbabwe_10_point_plan.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/83904959981.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigorekotat.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_off000074f2.bin
ba4eef7f5f7ba75e6dbbb552b85efa98b3dbcd8468cac63a19934e6b2397c8de
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F2 5496 bytes
font_01_sfnt_off0000877f.bin
19a52e84556bc7b0735d9f9fbdc02907c0f9a576813ed5fb4ad05073bbb3abd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x877F 9684 bytes