Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a282ea8a5677e3…

MALICIOUS

PDF

46.0 KB Created: 2020-07-30 16:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69fb97afc98eb1208230e1e96ae0a89f SHA-1: 998828d0a6ec0e0a0427b9f1b6baa31daf9db06b SHA-256: 14a282ea8a5677e3ca191240859701927ce2638351b0bb8ae74e35ff46f168c8
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document also exhibits characteristics of a link farm, suggesting an attempt to distribute or monetize traffic through numerous external PDF links. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution 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.com/pify?keyword=learn+french+pdf+online
    • http://files.sccwestcovina.net/uploads/1/3/0/9/130969790/3d8c49145c5b42.pdf
    • http://files.tiffanywitownhall.com/uploads/1/3/1/4/131453618/4537409.pdf
    • http://files.lipsbylil.com/uploads/1/3/2/6/132682822/0f13ec394564da3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7319/1587/files/46216874315.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/91972313603.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1959/files/vofufovom.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/nopikadisukifelod.pdf
    • https://cdn.shopify.com/s/files/1/0435/8779/7160/files/zejesuluzerawebexovibo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1047/4663/files/33474709538.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/4663703139.pdf
    • https://cdn.shopify.com/s/files/1/0434/9581/7382/files/faridalizuxerefejag.pdf
    • https://cdn.shopify.com/s/files/1/0428/8839/6959/files/22640767837.pdf
    • https://cdn.shopify.com/s/files/1/0440/8344/5925/files/gukigurute.pdf
    • https://cdn.shopify.com/s/files/1/0428/3102/0198/files/tuduxe.pdf
    • https://cdn.shopify.com/s/files/1/0436/7482/8953/files/genidigaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/fopune.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6090/files/53207229153.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_off00007799.bin
d390443edc6d89665f4af0aff6dd1a7587e7671b37aa0504a5ed8a09c2db71c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7799 4712 bytes
font_01_sfnt_off00008781.bin
61a7ec003bb917918787490bdcf421f0f265d2f9d93d535a0fc1b1158d105e55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8781 10296 bytes

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