Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b056ae2f5199e32…

MALICIOUS

PDF

40.6 KB Created: 2020-08-27 14:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bf5a2d95d5dc6814b262d44d8e8bf2b SHA-1: 5ec0736cfeaf339c9694427249d4fcf3ef6e20cc SHA-256: 5b056ae2f5199e32823624bff46e2315fce5f6e04dba174f10ef4d7a2db07c17
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to further malicious content. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs, suggesting a coordinated effort to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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/pify?keyword=merge+dragons+easter+event
    • http://kizokol.bryantcyr.com/uploads/1/3/0/8/130813528/4209fff15f.pdf
    • http://files.boonieandco.com.au/uploads/1/3/1/8/131871714/kuduxugip.pdf
    • http://files.artbyjonmcgaa.com/uploads/1/3/0/7/130775497/nawigabomitaz-kazedozonake.pdf
    • http://nowawik.richardeinerson.com/uploads/1/3/0/8/130873826/vimoviro-vetulivivov.pdf
    • http://files.jeffreycobb.com/uploads/1/3/1/8/131856547/ligiwowumoze-wovowebozuku-tamifiriwavi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/wuxuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/tiwipivafelazafunelij.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/munisamekan.pdf
    • https://cdn.shopify.com/s/files/1/0440/5159/5429/files/70136070402.pdf
    • https://cdn.shopify.com/s/files/1/0462/7274/1533/files/jowemizelilulovotewe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/64709944491.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/buruw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60868594071.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/sumojuguruzi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/4chan_nsfw_gif.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_off00006168.bin
a8c1c9e84a1fda2bac7c7e005f882ccbcca409f09242cc1bff12e7e6935d836a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6168 5028 bytes
font_01_sfnt_off000072a1.bin
5ea79337afac6853344eeba44cdcb6aba6d66806c7d8640e60a604d4260bd947
pdf-font-stream PDF embedded font (sfnt) at offset 0x72A1 10400 bytes