Malicious PDF — malware analysis report

Static analysis result for SHA-256 667d9d65208c5bd0…

MALICIOUS

PDF

50.2 KB Created: 2020-08-30 22:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b507f7532992d41aa94763ef37b43d2 SHA-1: 5a56c5ca0160d7294535fd000858aa428e7718d4 SHA-256: 667d9d65208c5bd08d008e3a7d7b48ab2d4e1f247e4603f89c2119f2e69e0745
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.cc/wix?keyword=dumbbell+workout+plan+5+day, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a workout plan, suggesting a lure. The presence of numerous external PDF links, many pointing to benign content, indicates a potential link farm or SEO manipulation tactic to obscure the malicious redirector. No scripts were extracted from this sample.

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=dumbbell+workout+plan+5+day
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_fae4bc71b46c44b0aae9655d242d7e39.pdf
    • https://static.usrfiles.com/ugd/eaf48f_180ee269847b4502bce99597a7a6d746.pdf
    • https://static.usrfiles.com/ugd/b8c837_90644722b4944c36be91780c1542a9de.pdf
    • https://static.usrfiles.com/ugd/b8c837_0dcf7ec2b9304b93a502b2df4ea6278d.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/8997/files/26789733417.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/79086551571.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/50680128298.pdf
    • https://cdn.shopify.com/s/files/1/0437/1818/1013/files/gofopazusunizuzati.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/rizeritobobo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/folax.pdf
    • https://static.usrfiles.com/ugd/1decf9_2dcbbd4d0e8548e08baa4c5f3cd0af8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a82f4c152217449f96f16aabdbc772ee.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a18.bin
95926a256b5ae9ab9d6bfec9237ddac085af39972b242cc9386b280da4e44705
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A18 5280 bytes
font_01_sfnt_off00008c05.bin
be709a5baa422d85ffd7f3912ee94ee461d0bcfb9a46a01c5ba4afdff3709560
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C05 9980 bytes
font_02_sfnt_off0000ae3d.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE3D 4324 bytes