Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0da3599f314f8b…

MALICIOUS

PDF

47.3 KB Created: 2020-09-04 21:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80547f9ac409d2d1ab3192fcc4395056 SHA-1: 9afe0b31b2267a586143e70f8aaf17925ef62604 SHA-256: 5c0da3599f314f8bb70a809a9382b7bb3901da43fd7941e75cb78c0b01b1d901
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.link/wix?keyword=service+improvement+plan+template+excel'. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, suggesting a link farm or redirection attempt. The ML classifier also strongly flagged this PDF as malicious.

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.link/wix?keyword=service+improvement+plan+template+excel
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/78c764_b89ef5631d3242299cfbf57f9b7e040b.pdf
    • https://static.usrfiles.com/ugd/269bb8_0a78a586544f4c66a5bc62d2aa50fcd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_3db128fc619940f7898698c55b1c2cc2.pdf
    • https://cdn.shopify.com/s/files/1/0438/4368/2469/files/9308702266.pdf
    • https://cdn.shopify.com/s/files/1/0434/2372/7783/files/vusumubitivutuli.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/44498119263.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fbe8aa1ddb442968027325f89fc08b0.pdf
    • https://static.usrfiles.com/ugd/5be868_acff623750dc4c1faa611429ee844b87.pdf
    • https://static.usrfiles.com/ugd/ba3095_e943c63781a64aeba9f9d924f6a3388c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8895a66aa5e94c0aa5629c65ffb013c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0252aac7b25f41178d4ae09497bf6393.pdf
    • https://static.usrfiles.com/ugd/c068f8_f18edcc43c794f3f93f1c9415938930c.pdf
    • https://static.usrfiles.com/ugd/c722c2_4e2c846d4b4548f5a836522c520969a6.pdf
    • https://static.usrfiles.com/ugd/429b25_d5606e4bc6fd49cf9d78c5d914cd2a0e.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_off00006e74.bin
77faf410cdef29dcac5c8f4c668bc287943a40fdcd5e2b32361484eccfc0abec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E74 4920 bytes
font_01_sfnt_off00007f08.bin
ecff031cefdf07ca17f53aa836e3c0f7c9368e4dfbcb898ccb4815cadd026da5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F08 10292 bytes
font_02_sfnt_off0000a24f.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA24F 4324 bytes

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