Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6b0296b1dc7f9d…

MALICIOUS

PDF

40.6 KB Created: 2020-08-18 19:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3654e095a3142901aea6b762f5f18f10 SHA-1: bd78175cd00c883964a8ea0cf7d574ca29bcfa56 SHA-256: 6b6b0296b1dc7f9df7f203622aa403de6c66f1b8e159d6b2cbaada5ad5de9866
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 used to obscure the final destination of the malicious payload. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs confirms the intent to direct users to external, potentially harmful, 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/pify?keyword=android+mobile+phone+7000
    • http://files.ericstacticalgear.com/uploads/1/3/1/4/131453136/9712733.pdf
    • http://metovub.dprgp.org/uploads/1/3/2/7/132740405/f8d18907eb0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/cadena_de_valor_ejemplo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/56287176028.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2310/files/tovoliv.pdf
    • https://cdn.shopify.com/s/files/1/0437/1290/5370/files/muzumigetadudowowaxabivi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/19147687370.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/vajokerakinuxel.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/71606755396.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/47508073678.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/wonderful_tonight_acoustic_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/7014/4166/files/devowogupivupuzodari.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_off000060fe.bin
8b2dedc0ad86d3074c607300ce4af57b3678b127b7d696b04f8ca81ccc80e530
pdf-font-stream PDF embedded font (sfnt) at offset 0x60FE 5160 bytes
font_01_sfnt_off00007260.bin
5bd6af456c391779bd91357097d9e1bff4d8e5d7f2126339a9d1dbb5533a51d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7260 10372 bytes