Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f45530593e17a4…

MALICIOUS

PDF

40.6 KB Created: 2020-08-21 09:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5cff71b40beb369e97dc695b04b9428 SHA-1: 1294a3b575bee9f7afbba8040244a23b10cc5c5a SHA-256: c3f45530593e17a4d7e57a1990807560c34b6ff61d8928230b0347ecb62cf6e7
152 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, specifically pointing to 'ttraff.cc'. The document body also contains this URL, alongside numerous other Shopify-hosted PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector indicates an attempt to lure the user to a harmful destination.

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.cc/pify?keyword=gnc+pro+performance+creatine+monohydrate+unflavored+review
    • http://files.missmontgomeryart.com/uploads/1/3/2/8/132815806/valenatajuwe-kamanalubej-vatanajopajef-zazelogewurod.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7181/files/guided_tours_singapore_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/torekasapubokax.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/wilomisexukudibuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/38332943313.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/wedebadux.pdf
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/tratamiento_para_escabiosis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2669/2771/files/oxford_school_dictionary_and_thesaurus.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/35186746696.pdf
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/12193248595.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_off00005e91.bin
6abee5af96f1a3610a104fa078f38f481852906092ea4079dffba8e4068526ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E91 5504 bytes
font_01_sfnt_off00007132.bin
1bbdf852a005561adf01a00c40231d8636c17375e5d11b6dd1d341c0092bb8d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7132 10652 bytes