Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d6aceee31d164a…

MALICIOUS

PDF

44.2 KB Created: 2020-08-06 11:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f647198f740915cebd86a694e7d76cf7 SHA-1: 7155af211e1026189d1d386ba2311cd799031004 SHA-256: c9d6aceee31d164a554d5e0fc73e830c42817bacb270a0adddf8500436f93294
152 Risk Score

Malware Insights

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

The PDF document contains a high number of embedded links, many pointing to Shopify domains, but one critical link to 'ttraff.com' is identified as a malicious redirector. This suggests a link farm strategy to distribute malicious content. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing its role in a redirection scheme. 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=empirical+formula+and+molecular+formula+worksheet+pdf
    • http://files.monfortestatesdacula.com/uploads/1/3/2/6/132681002/226bb98.pdf
    • http://files.anzty.com/uploads/1/3/1/3/131381376/4207680.pdf
    • http://files.boonvillemusic.com/uploads/1/3/0/8/130874154/68f5ce.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0435/4503/4911/files/taks_test_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/pamifajurutejapuxejoxapad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/36997202947.pdf
    • https://cdn.shopify.com/s/files/1/0437/7234/6526/files/20481487476.pdf
    • https://cdn.shopify.com/s/files/1/0432/6899/7283/files/53768340352.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/46288138889.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0858/files/sbu_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/gobav.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/39851118347.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/jadomanakaviko.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_off0000628c.bin
6466ceafb7d507cb20b95ed0c9956a3ffaf85699bb06bf977a61441cf4d56476
pdf-font-stream PDF embedded font (sfnt) at offset 0x628C 5508 bytes
font_01_sfnt_off00007535.bin
009f611817f26f5c89f6aba92d7b05ea6159adb50b5b9281f6abf7f2d39c4dff
pdf-font-stream PDF embedded font (sfnt) at offset 0x7535 14132 bytes