Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d078300a4f9aa2f…

MALICIOUS

PDF

39.1 KB Created: 2020-08-29 17:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45c994889255f3e0377b8bc8a22e9f86 SHA-1: 23a101626af762d0c2a12ce06be4e2f270344e7e SHA-256: 6d078300a4f9aa2fdac42dc1f48f3191e3c6b81198d147a7abf417ff10a5ea7a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document also features a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or content stuffing tactic. The ML classifier strongly indicated maliciousness, and the overall structure points towards an attempt to redirect users to malicious content.

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=all+of+me+sheet+music+easy
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/30160691621.pdf
    • https://cdn.shopify.com/s/files/1/0438/4024/1829/files/jeopardy_think_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/zuxemujoperuvonawux.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7531/files/residential_buildings_types.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/42180695233.pdf
    • https://cdn.shopify.com/s/files/1/0443/0535/0812/files/violin_and_cello_duets_pop_sheet_music.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_3da6ca5f0bf34dfe9cc44b09af72dc76.pdf
    • https://static.usrfiles.com/ugd/b8c837_1902b7e3d2804492a3faf56f5da7441f.pdf
    • https://static.usrfiles.com/ugd/b8c837_4256e1a6ffbf4d08a811cea1e5adb1dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d88f92868a5f40da95dd08a4dac8d4ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf840f32a4434f0f821d515fb9d5e80e.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_off00005b05.bin
39dde475a65d2377b08d3cc02b34038d7570ff44324aefd1f01af6c2fa300529
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B05 5116 bytes
font_01_sfnt_off00006c5d.bin
498436515333fd6e66dcdced3a5dec10f8129006c97c9eab9832bbf31baae58e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5D 10456 bytes