Malicious PDF — malware analysis report

Static analysis result for SHA-256 790f5f134b5fb069…

MALICIOUS

PDF

39.2 KB Created: 2020-09-01 22:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 106aa478f6561059beb110e4662f4c1f SHA-1: 6c88cd72669fe1a1fa480398c2752c860845b322 SHA-256: 790f5f134b5fb06964c62411d04a6d451b8c8ef71e5ffc8876a4bafeaa3df993
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, https://ttraff.com/pify?keyword=indemnity+form+template+australia, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking it. The presence of numerous other links to Shopify-hosted PDFs, while benign themselves, contribute to a link farm pattern, potentially for SEO manipulation or to obscure the malicious link.

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=indemnity+form+template+australia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/44550393625.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/medical_virology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0461/8954/3582/files/gafazududijum.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/95537749974.pdf
    • https://cdn.shopify.com/s/files/1/0435/5401/3336/files/95230405501.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3863/files/45680708947.pdf
    • https://cdn.shopify.com/s/files/1/0433/0556/6366/files/81242330896.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/guns_germs_and_steel_episode_1_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/9488097588.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/informal_agents_of_social_control.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/breaking_india.pdf
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/37127594210.pdf
    • https://cdn.shopify.com/s/files/1/0433/4397/0463/files/81187824166.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/fegetuwonux.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a74.bin
d0225b617100413d1af7f30f066de0f18cbc2f3cf2b984f861522867bacb990f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A74 5224 bytes
font_01_sfnt_off00006c2d.bin
a4a558dbea2f93ae0fd4553d0f67a71e042edc3c08625aa5c1ad19a97b04a1a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2D 10500 bytes