Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccdc83ede4ea67c…

MALICIOUS

PDF

40.7 KB Created: 2020-08-23 21:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78b04c8745b5eac053f2771ddbc0efdc SHA-1: d3c1d2eebc7abd22c97155aae68143e74d9db966 SHA-256: 6ccdc83ede4ea67c50ee5f389d99bba1cf5c416509d9f3c987989eaf5f791bc6
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to distribute malicious content or phishing pages. No scripts were extracted, but the PDF structure itself is used to host and distribute links.

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=fieldcrest+sheets+supima+classic+hemstitch
    • http://moleraka.matsusokankarate.org/uploads/1/3/1/3/131398348/bebowewop.pdf
    • http://files.artbrouse.com/uploads/1/3/1/4/131437242/3318521.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/0672/1957/files/kufipejataxalelutakobut.pdf
    • https://cdn.shopify.com/s/files/1/0433/2394/9224/files/ielts_essay_samples_band_9_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/42315695612.pdf
    • https://cdn.shopify.com/s/files/1/0439/7491/8302/files/69850317200.pdf
    • https://cdn.shopify.com/s/files/1/0431/6194/4228/files/9970114731.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1356/9687/files/gixolox.pdf
    • https://cdn.shopify.com/s/files/1/0439/6358/0574/files/calendario_laboral_2020_madrid_oficial.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/buxugeloputejo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/78130457219.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/kanijifaxujotax.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_off00005fc8.bin
7d044af0d78a6f5760872694d0d7ab8e2834a562ae59e0ab7c66e866a00f4eac
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC8 5268 bytes
font_01_sfnt_off0000717e.bin
594192c59fa74c09246859b6c9fb51830903ac123a5edaa55519bf5172728be7
pdf-font-stream PDF embedded font (sfnt) at offset 0x717E 10724 bytes