Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e772b21fa84d74…

MALICIOUS

PDF

43.8 KB Created: 2020-09-06 23:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3be70df85dbc800e8518b5cf72aa9c4 SHA-1: b91827dea280c6937265eb4a8b3b5b6929e8818b SHA-256: 04e772b21fa84d7440e2d516a6e6d1d9858a5cd6529ff1623d0155325f541e41
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. The primary malicious URL, 'https://ttraff.club/wix?keyword=free+building+information+modeling+software', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains keywords related to free software, reinforcing the lure.

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.club/wix?keyword=free+building+information+modeling+software
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/9427/6264/files/bromatologia_biomedicina.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70474217151.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1188956193.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/75091866419.pdf
    • https://cdn.shopify.com/s/files/1/0436/6296/6937/files/nawutilipogezotebojadeda.pdf
    • https://static.usrfiles.com/ugd/8d5d69_6db3bc8badbb491382ac24302cb73e22.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/77028222087.pdf
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/excel_change_footer_on_all_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bofudajix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/97358961448.pdf
    • https://cdn.shopify.com/s/files/1/0438/3758/7606/files/25930500302.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/jumis.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/fiputusifo.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_off00006d44.bin
15dae602f5d96b806e6f4712b7d290854368d91c49f653ac30ed128da8239dc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D44 5416 bytes
font_01_sfnt_off00007fac.bin
7b5d32a09c61349a400c96e6dba96f6249e1912e096cbd8577b3c577eb00cc11
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAC 10116 bytes