Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d01e49cd5c5029…

MALICIOUS

PDF

41.8 KB Created: 2020-08-19 14:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e2eacab928b57ac27b808a0337f9298 SHA-1: 6362d97783bd9d03c898d6d23885e252db479390 SHA-256: 18d01e49cd5c5029f9093181c1febbcba305cfe222fac6db7107b8550d37c5cf
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, a technique often used for SEO poisoning or to create a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=couple+goals+video+status', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL and references to other PDF files, reinforcing the link farm and redirection attack pattern. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggests a phishing or traffic-generation scheme.

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=couple+goals+video+status
    • http://files.jlkbodybutters.com/uploads/1/3/1/4/131408100/3e1a580b7448.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/58495455285.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdf
    • https://cdn.shopify.com/s/files/1/0440/5500/3286/files/kemed.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/17312101136.pdf
    • https://cdn.shopify.com/s/files/1/0437/2814/2501/files/resakud.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/kuditexokegegekejuganu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/79959205834.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/17345474347.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/13568448210.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/13109617697.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_off00006815.bin
0bf513c8c12dc85fae00e531172780a78f7ef53ebbe133ffc6ba3904bac3c886
pdf-font-stream PDF embedded font (sfnt) at offset 0x6815 4996 bytes
font_01_sfnt_off00007932.bin
6d94357f0b82f14cba9889f806a09697beaeb1203b1d35f51fa7ff16ffc34617
pdf-font-stream PDF embedded font (sfnt) at offset 0x7932 9880 bytes