Malicious PDF — malware analysis report

Static analysis result for SHA-256 493c8b3ad48f76fb…

MALICIOUS

PDF

65.0 KB Created: 2020-08-09 15:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70fcd2a00f290cc8d83f1f8cd0cbd8fb SHA-1: 6b535a11224b968e1223696b321d0ec6042d8e37 SHA-256: 493c8b3ad48f76fbe24a873071673b51622cf0b41fd14d1f7347fb1b86cddba9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to serve the final payload. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF filenames, suggesting a lure to download further malicious content.

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=alimentos+con+calcio+pdf
    • http://files.mrmady.com/uploads/1/3/1/6/131637362/ff1a4f7.pdf
    • http://vugabogu.rainwaterfalling.com/uploads/1/3/1/4/131453494/ed2a18.pdf
    • http://pomalojo.togetherforasthma.org/uploads/1/3/1/3/131383483/bbfc8b9e21267.pdf
    • http://files.bluemountainseimei.com/uploads/1/3/0/7/130739811/5ae17075222d.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/89614819036.pdf
    • https://cdn.shopify.com/s/files/1/0432/9167/2736/files/tirevowokisirevajumabo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8019/7031/files/50725957973.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3381/files/17th_amendment_in_constitution_of_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0434/0727/8238/files/10063704966.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23651487672.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/circumference_of_a_circle_word_problems_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/la_belle_au_bois_dormant_conte.pdf
    • https://cdn.shopify.com/s/files/1/0436/7620/5209/files/vosawudama.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/22033887544.pdf
    • https://cdn.shopify.com/s/files/1/0433/1762/4990/files/nolenowebeposaboxiximex.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_off0000b617.bin
c1fb8a4a7c3bb294d8903cf4a5b2fd6769a97a2baefc261c41ca6fe19b9e4c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB617 5196 bytes
font_01_sfnt_off0000c7ba.bin
2d96f4848bd544486386776f0288eb40becfaedd61ee975fede4f51a7d2b049c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BA 15816 bytes

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