Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1bb9f62f4207b10…

MALICIOUS

PDF

40.7 KB Created: 2020-08-09 08:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a571c093f9e2d3a1c0f693ff239c3d7 SHA-1: 71cc8684f2a628ed041bd32ff3ce322e430eeada SHA-256: d1bb9f62f4207b10b66f5c198caaa26ad82b565befca68c0241da6c4af12580d
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=pathogenesis+of+essential+hypertension+pdf'. The document body, though heavily obfuscated, contains text related to 'Pathogenesis of essential hypertension pdf', suggesting a lure to disguise the malicious intent. The presence of a link farm heuristic further supports the idea that this PDF is part of a larger SEO poisoning or phishing scheme.

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=pathogenesis+of+essential+hypertension+pdf
    • http://files.hlcaurora.org/uploads/1/3/0/8/130874411/23c8f045.pdf
    • http://files.alyssaastevenson.com/uploads/1/3/1/8/131871864/6353871.pdf
    • http://rabukesut.huningtonchase.org/uploads/1/3/1/6/131606490/4106071.pdf
    • https://cdn.shopify.com/s/files/1/0430/5420/3031/files/rapid_sand_filtration_process.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/baby_essentials_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8770/files/vuwanazefunusulipos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sozolomunegodufedawugiwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/javascript_current_year.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/5053036286.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/pufevarade.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/61425893572.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8890/files/61189391625.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/53387850774.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/77735958258.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/botany_practical_book_for_bsc_2nd_year.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4542/files/bacteria_helicobacter_pylori_sintomas_y_tratamiento.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_off0000629a.bin
49be80e79b59bc4707552002a6ee5e9313841415a980354ae002d894f92a4a57
pdf-font-stream PDF embedded font (sfnt) at offset 0x629A 5408 bytes
font_01_sfnt_off00007505.bin
fbcb50323244d843bfc137b4e27410272111b71429262f970521b9e5056f3823
pdf-font-stream PDF embedded font (sfnt) at offset 0x7505 9544 bytes