Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe270d6437a2d65…

MALICIOUS

PDF

32.7 KB Created: 2020-08-29 11:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a14d4609ed27203dd49ed34e1166e13 SHA-1: 7de7b31f20672f30dc2dfeba38f3c9bff617e98a SHA-256: cfe270d6437a2d65f1508f2d9fe3424f6db4b8e4efe1a0f922011b5428c743ba
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=sims+4+tube+top'. Additionally, it exhibits a PDF link farm behavior, with multiple links pointing to Shopify domains, one of which is 'https://cdn.shopify.com/s/files/1/0429/6219/0499/files/sanaxamidapoxig.pdf'. The document body appears to be heavily obfuscated or corrupted, but the presence of the malicious URL is the primary indicator of compromise.

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/wix?keyword=sims+4+tube+top
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/sanaxamidapoxig.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1285/files/protocolo_aplasia_medular.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/disney_mambo_number_5.pdf
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/pisixazusiwinibawelitixam.pdf
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/13526524204.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/21249085248.pdf
    • https://cdn.shopify.com/s/files/1/0437/6569/4613/files/55953143442.pdf
    • https://static.usrfiles.com/ugd/b8c837_d08bd93ebae74a728af5cc5ece301b5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b199982e9424494faa47077ed883b1b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbaeaea4b804489d93f29cc5b707b7c5.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_off000043a6.bin
c17f77bb1cba527e40027c57c87925e9533673f8a7d091649b09feee38d9996e
pdf-font-stream PDF embedded font (sfnt) at offset 0x43A6 4956 bytes
font_01_sfnt_off00005472.bin
4fe7653216ba77140c3943d6cb31a7280ed400721e2be9b88176c005da740e31
pdf-font-stream PDF embedded font (sfnt) at offset 0x5472 9936 bytes