Malicious PDF — malware analysis report

Static analysis result for SHA-256 7959f80f53abc86c…

MALICIOUS

PDF

49.5 KB Created: 2020-08-22 03:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 443d3b07080644c8eca8b7eea6b8adf6 SHA-1: 612ca5985836e5ba75e57c23648274cf948dfa9a SHA-256: 7959f80f53abc86cd1c21f07f0e34de251a2cb82b1e419f5ac900f57ab2a0094
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests an SEO poisoning or link farm tactic to drive traffic to malicious sites. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing its role as a lure. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

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=behringer+x32+rack+manual+deutsch
    • http://podigeka.vadervanodin.net/uploads/1/3/2/6/132681352/tudaxilumoror.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/bee_house_stardew.pdf
    • https://cdn.shopify.com/s/files/1/0434/8814/9654/files/nilelek.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/radula.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/46195737700.pdf
    • https://cdn.shopify.com/s/files/1/0433/5891/2662/files/69536576512.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/tepeso.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/97287240027.pdf
    • https://cdn.shopify.com/s/files/1/0434/5584/0409/files/susewubimege.pdf
    • https://cdn.shopify.com/s/files/1/0433/2657/0664/files/jquery_clear_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/86960218296.pdf
    • https://cdn.shopify.com/s/files/1/0436/9616/0923/files/rubber_sheet_suppliers_in_saudi_arabia.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_off0000818f.bin
d09facf50ec69577273a0ef0eef881a7a359543af1d868070dadda3d232a0984
pdf-font-stream PDF embedded font (sfnt) at offset 0x818F 5828 bytes
font_01_sfnt_off00009532.bin
0e5d64e1dab76bed12f2c0567eb21356ed6ca84ed54b836d77d3a99f96d2e0ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x9532 10480 bytes