Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ad42b6c52153ee…

MALICIOUS

PDF

43.5 KB Created: 2020-07-31 12:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11e197e22c3a905df60bd67b8cfb9f28 SHA-1: 0d3c429e4390143b721a1b73a7acebe37e95c5b4 SHA-256: 47ad42b6c52153eefdb8afa6d46e998d26e9b3ee0d32f993f93942bfdde9a273
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'ttraff.com'. This suggests the document's primary purpose is to lure users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=advanced+excel+functions+pdf
    • http://files.melissaragland.com/uploads/1/3/1/3/131380308/dunevavob.pdf
    • http://files.wgscontemporary.com/uploads/1/3/0/7/130739294/wifobagugeko.pdf
    • http://files.buzzsonofabee.com/uploads/1/3/1/4/131482823/gumuporuliwufikixup.pdf
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/37254051006.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6952/files/vopekimalitepagu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8758/5699/files/16874036442.pdf
    • https://cdn.shopify.com/s/files/1/0433/7310/1214/files/kobawagejene.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/kimadinojenaku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1048/files/mixinejas.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/bizixomova.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/8984660007.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/84530469079.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/zosirupigigafelam.pdf
    • https://cdn.shopify.com/s/files/1/0436/0667/1517/files/bimepabojuwisejugitawuv.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_off00006ba0.bin
91a960e0d4cd148b7554e536033c6c4e45ac40595bf1fc0182042782ae51a699
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA0 5052 bytes
font_01_sfnt_off00007ceb.bin
90606dc8e1a70cbb670aa1d59903edd88f8bbfda1547bc1d805118039b3a3ca9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEB 10864 bytes