Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9106f02cc7806ff…

MALICIOUS

PDF

44.6 KB Created: 2020-08-03 14:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a5e4274c719e10740a7c6dd6505b64f SHA-1: 6400006542c0e1a046874ced92857f6d989e0667 SHA-256: c9106f02cc7806ff78b009bdee178ae0776d6da26f37dbd3ede9742987e11fc6
120 Risk Score

Malware Insights

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

The PDF document contains numerous links, with a primary link pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'medical books online pdf'. The presence of a link farm heuristic indicates an attempt to distribute malicious content through a large number of external links, likely for SEO poisoning or to obscure the final malicious destination. No scripts were extracted from this sample.

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.cc/pify?keyword=medical+books+online+pdf
    • http://files.maryskitchenmeals.org/uploads/1/3/2/3/132303082/8274227.pdf
    • http://files.wildhuntmasks.com/uploads/1/3/1/8/131856827/85aa3e.pdf
    • http://files.judicheco.com/uploads/1/3/1/6/131607712/9605056.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/74691274443.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/6837856528.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/dixup.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/95734573326.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/xalebukitupovilikowopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/balazofe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/woguvova.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/45575109313.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/zupurigetizuruzokejinag.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/wubijobudugomofef.pdf
    • https://cdn.shopify.com/s/files/1/0437/4485/4165/files/19027054850.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_off00006f37.bin
616eede5b3e2d23f69b6c38fa2ace4407bfd1962849b90dd3d0a01192914c201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F37 5260 bytes
font_01_sfnt_off0000813a.bin
80b46b0d644f9d64de677c68fb5697650fbf4f7238f472a224167f67393556b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x813A 10660 bytes

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