Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d947917913ab502…

MALICIOUS

PDF

39.8 KB Created: 2020-08-30 06:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6b6cc840bb8ff83db321c99af6b34cc SHA-1: ff06dfba6fd3d138cbdbe8592d2f560bc5de06df SHA-256: 0d947917913ab502094f96c1a37b4a2f2eb3e0a9d643bf8806c4245da46282ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO spamming attempt. One of the primary links, 'https://ttraff.ru/wix?keyword=reported+speech+dialogue+exercises', is flagged as a malicious redirector, indicating a potential phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=reported+speech+dialogue+exercises
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_563e00509e5f4d25a3223ff5547c9d4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_eaf3340ce393431a8cf9bcce220e30dd.pdf
    • https://static.usrfiles.com/ugd/0a052f_573232c9cd22419c951d08792c56f04a.pdf
    • https://static.usrfiles.com/ugd/a18aa6_788406e8bc4f4eb08ccda8b56ffdf63b.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/skyrim_ps3_mods.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/fortune_lies_at_the_bottom_of_the_pyramid.pdf
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/6418987484.pdf
    • https://cdn.shopify.com/s/files/1/0433/8237/4561/files/australia_visa_application_form_sample.pdf
    • https://static.usrfiles.com/ugd/1b8612_f83c5fc1a3a343a4b1d51f4c5ae3f9a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_62609fc3d8e44fb5af0221e5eaf5e002.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ac059802fc34f08872ac0a45fc587c4.pdf
    • https://static.usrfiles.com/ugd/d2751c_87a734a48db547bdbf978a972c2f2eef.pdf
    • https://cdn.shopify.com/s/files/1/0433/4524/8421/files/nascar_heat_evolution_pc_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/13903316047.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/komplikasi_angina_pektoris.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_off00005d21.bin
053ad157fb620e7b57a92339872c6de6b8f78a1bc6216ad66e24f394111043be
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D21 5412 bytes
font_01_sfnt_off00006f8c.bin
859bb6e0076feea121e7d65d4e6de4d9ce3d50dcf0f61a4eea5f1f43e78ef2ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8C 10192 bytes