Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5ca2fbd878c709…

MALICIOUS

PDF

40.6 KB Created: 2020-08-29 15:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 017634ccbf0b289febccf6a688445084 SHA-1: ebde428dd3c1ed1cef8e3935eb7b5e29be36d705 SHA-256: 5a5ca2fbd878c709193494c81cbce93cc7349293ef79af89462bcde3b068be8a
162 Risk Score

Malware Insights

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

This PDF file 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 features a large number of embedded links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The presence of a download button lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=kinivo+bluetooth+driver
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0452/4598/9021/files/guvukigejab.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/muvonejudotovij.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/37285010143.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/naxosedemik.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/25621766085.pdf
    • https://cdn.shopify.com/s/files/1/0440/8469/1094/files/saco_cinemagic_movie_times.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/3d_plot_python.pdf
    • https://static.usrfiles.com/ugd/b8c837_464719e5afc041edb69eff43dd4ba4bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8e6a21790ce485ab6fe7bd13fe62d5a.pdf
    • https://static.usrfiles.com/ugd/b8c837_71f8c17080884841932376b293b9c202.pdf
    • https://cdn.shopify.com/s/files/1/0440/2066/2422/files/xidaba.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/jikelolukovupo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1103/9655/files/dimension_breaker_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/gomipixomun.pdf
    • https://cdn.shopify.com/s/files/1/0429/5055/7855/files/test_bocconi_2012.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_off00006281.bin
69f3251044fd9f756636ef7803d50f6c01af52a753c33e75e0e3616beb8aa7c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6281 4696 bytes
font_01_sfnt_off00007271.bin
4b7fa7221cd9043206db08373f12c1220f8017edc02279254161d65f03e2864a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7271 10424 bytes

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