Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9c86ecc373e744…

MALICIOUS

PDF

35.0 KB Created: 2020-08-05 02:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d610d617a29c870e5fa451982aeaa4aa SHA-1: e6deef86596dca1d0754316186da7a3f3063412c SHA-256: ea9c86ecc373e7441dbe125192232c8be25d3e70603907d1aba95f680e12553a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector at 'ttraff.cc'. This indicates a link farm or redirection attack designed to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=canon+in+d+ukulele+pdf
    • http://files.representwebseries.com/uploads/1/3/0/7/130775371/1725998.pdf
    • http://files.coastalacad.com/uploads/1/3/1/4/131454158/kiwewineseruzoluwizo.pdf
    • http://files.irazoqui.net/uploads/1/3/1/4/131454523/0fb7108baa27.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifowugebivagobawogun.pdf
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/55619726063.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0816/files/38745055858.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/23959209197.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/andreas_moritz_ksiazki.pdf
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/85424135174.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/wifi_key_recovery_without_root.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0728/files/55377812453.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/rocky_mountain_atv_fantasy_supercross.pdf
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/jilojerujubatadatimokamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/jumosizozakejik.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9571/files/puvaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/48772642873.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bc5.bin
97673735bf58790fb90149826ea9f1ced1f0d994da6e17397c351d5104d4a285
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BC5 4728 bytes
font_01_sfnt_off00005bf2.bin
f58e21cb1d768166c1f23eea6d3b4b4279a64be6854b22866b6f039b861177c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF2 10756 bytes