Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3ad8200847598c…

MALICIOUS

PDF

38.0 KB Created: 2020-08-30 11:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e21592e7d72d368ec6a60229625aceb1 SHA-1: 5d842de2f5ed9e3a69a693066391e27ed0a9b4b9 SHA-256: 5f3ad8200847598cf319433252f022d859f1c3c9905ac23a0c29712a787184f3
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/wix?keyword=the+clash+lost+in+the+supermarket'. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO abuse. No scripts were extracted, but the embedded links are sufficient evidence of malicious intent.

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=the+clash+lost+in+the+supermarket
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0457/3675/5356/files/tamusolizasejekiwejovajuf.pdf
    • https://cdn.shopify.com/s/files/1/0439/5443/8302/files/detective_conan_last_episode.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/womolorikitire.pdf
    • https://cdn.shopify.com/s/files/1/0435/6371/2671/files/penguin_readers_level_3_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_58cefc3aef284e358fb09f3a1017fe3c.pdf
    • https://static.usrfiles.com/ugd/4f270c_06267c075a0c46f99f3e14e443dd5473.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a099aa030a84d0eb09d07f9fefb500f.pdf
    • https://static.usrfiles.com/ugd/98e298_84ac739e03db45ecaab326f696639012.pdf
    • https://static.usrfiles.com/ugd/6924eb_e142da1ef840453fab43c4139bfba75f.pdf
    • https://static.usrfiles.com/ugd/99965f_964e54f4cb4943919417fd2e0b3d2daa.pdf
    • https://static.usrfiles.com/ugd/c7a620_e5624c1f7669472ab3dd0f7dd9006605.pdf
    • https://static.usrfiles.com/ugd/5b9365_8749f39e8cd8462e96ce6194fc8e606d.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_off0000583c.bin
7dfc874605288274497b8f541e7cdc098c5ab8d233c7ba72a3cd99134b2e266a
pdf-font-stream PDF embedded font (sfnt) at offset 0x583C 5184 bytes
font_01_sfnt_off000069a8.bin
3582ca3be91e4e47b285888f6d7738b161557fc68370d7540bc0e4611c6334ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x69A8 10028 bytes