Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6b504b7b265237…

MALICIOUS

PDF

33.8 KB Created: 2020-08-16 00:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5332a12f3c848c89b85e905f8b7fd6e8 SHA-1: ae7b43b7a15431dd0aaab1f367a802d3ea0281c1 SHA-256: cb6b504b7b265237d274f7abe5e3906ab6f02f6551af04db9ce47bad9a6f3ec1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com' with a keyword suggesting a lure. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external resources, many hosted on Shopify. The primary intent appears to be directing users to malicious infrastructure via a deceptive link.

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/wb?keyword=barefoot%20investor%20pdf%20download
    • http://files.zionium.com/uploads/1/3/1/4/131437532/bac0ffc843.pdf
    • http://files.chineitsangnow.com/uploads/1/3/2/6/132695445/1089971.pdf
    • http://files.runnymedechemistry.com/uploads/1/3/0/7/130740586/rapepinaborobef-biketirepowupuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/51311391103.pdf
    • https://cdn.shopify.com/s/files/1/0438/5246/4293/files/bitat.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/51832440827.pdf
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/hospital_and_clinical_pharmacy_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/99485782079.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/dolusogofukis.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/xabowu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/zixefuride.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/lowetogo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1842/6267/files/20836620261.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/serazazidiribi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4519/0821/files/advanced_business_writing_skills.pdf
    • https://cdn.shopify.com/s/files/1/0432/6840/7464/files/catia_v5_learning.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/trigeminal_neuralgia_treatment.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_off000045eb.bin
25cc0bca3efcb1f59d2fe6fa6e5ff45e0de839505d961b90cd6860b4680e96e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45EB 5236 bytes
font_01_sfnt_off000057de.bin
f74fe430c6f95af20b127c6a30201a89516f2114261d62c2ff5471e0e7294187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57DE 9584 bytes

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