Malicious PDF — malware analysis report

Static analysis result for SHA-256 715275b3913d6713…

MALICIOUS

PDF

41.4 KB Created: 2020-08-29 17:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0682b042b2f40d632d4ad9d5819d47a SHA-1: 3350a6e9a65b8a985c43af5db83a8b2355880660 SHA-256: 715275b3913d67131c220968c694b9d33cf3ada84e1371eb60050ee973ddaaf0
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector pointing to 'https://ttraff.com/wix?keyword=complete+german+grammar+pdf'. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or redirection 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/wix?keyword=complete+german+grammar+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/8de238_8d96aaba3a2e4f67bb675ab4b764badf.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2a6b509b4aa4e8f9cbc3fd8b936a2cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_f451828e6a5e4f59b1a49fcadbce9e02.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/jaselufiwuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4277/files/64223707183.pdf
    • https://cdn.shopify.com/s/files/1/0435/7806/5059/files/fuvojizojeromopirawavixej.pdf
    • https://cdn.shopify.com/s/files/1/0431/9471/2228/files/86865547195.pdf
    • https://cdn.shopify.com/s/files/1/0434/0511/5544/files/dukipuxi.pdf
    • https://static.usrfiles.com/ugd/b8c837_d34944ebd7a840a1aca28e821e20bf63.pdf
    • https://static.usrfiles.com/ugd/b8c837_0792b88f3e704728b07e4b0b60683034.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_off000058bd.bin
aee687cb92bb3fe71c5883757d95ccb2e2226430b311c8ee1c9b835fecf94708
pdf-font-stream PDF embedded font (sfnt) at offset 0x58BD 4944 bytes
font_01_sfnt_off00006977.bin
63a258d04f5cfcebdb7b40b3b0641567a3124eb2833818beab19da317a65bc42
pdf-font-stream PDF embedded font (sfnt) at offset 0x6977 9836 bytes
font_02_sfnt_off00008b13.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B13 4324 bytes