Malicious PDF — malware analysis report

Static analysis result for SHA-256 7664f72195b9314d…

MALICIOUS

PDF

40.4 KB Created: 2020-09-01 12:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7de448cb3c2bcc12ef33f6a9c5b7f20 SHA-1: 86c6d4d70c6cabf45b7c6a9c7c831508bf3bee01 SHA-256: 7664f72195b9314dc0667c5a40b8ec436cca69e31acf6146ecb1b245a97d2b9d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to crossword answers and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially improve search engine ranking for malicious content.

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/wix?keyword=crossword+puzzle+answers+la+times
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7723/8945/files/anthony_robbins.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6837/files/zaguzakudelalefafo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/av_nodal_reentrant_tachycardia.pdf
    • https://static.usrfiles.com/ugd/cf14a4_49ea903992a14f15b9df2a506e039ef0.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/23320309665.pdf
    • https://cdn.shopify.com/s/files/1/0433/9141/8518/files/neet_application_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/0711/3373/files/99005723121.pdf
    • https://cdn.shopify.com/s/files/1/0432/9583/4280/files/86462412894.pdf
    • https://cdn.shopify.com/s/files/1/0450/9014/4421/files/59277216422.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/dufazof.pdf
    • https://cdn.shopify.com/s/files/1/0434/4899/1910/files/biodata_for_marriage_male.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/deadfire_builds_guide.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_off00005fcd.bin
d028a8ce654110448695860c2d9b498a595854700f6b6e945c84f88391e9023f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCD 5152 bytes
font_01_sfnt_off00007151.bin
d2916fdfcbc4cdd18d3a22f1b3a0bdaff501271ac1b612f4060df854e1b19c98
pdf-font-stream PDF embedded font (sfnt) at offset 0x7151 10568 bytes