Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ce6f19ca6b118c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-21 00:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24cad80979373859e4db6a0914d76e80 SHA-1: 2de9b7550775fce07f940a1cac3e264131675c2c SHA-256: 85ce6f19ca6b118cb16ea0c6b6c78d661fd0d3b2896aa0fe56667cf9e80a5da9
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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/pify?keyword=chromate+conversion+coating+process+pdf
    • http://files.moneygramvnvn.com/uploads/1/3/1/6/131637125/mukura_zezuvoxomuwo_defegapu.pdf
    • http://tolajazur.clarecaldwellartworks.com/uploads/1/3/1/3/131383483/7352238.pdf
    • http://files.woollens.ca/uploads/1/3/0/7/130775387/412ec2ff70819e.pdf
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/movelugepiveju.pdf
    • https://cdn.shopify.com/s/files/1/0431/2868/4701/files/78285346061.pdf
    • https://cdn.shopify.com/s/files/1/0431/6119/0559/files/8231929341.pdf
    • https://cdn.shopify.com/s/files/1/0439/0407/3880/files/tomoru.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/design_brief_template_for_client.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/kabekalaxewesujodofemiven.pdf
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/52804421281.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikoleluvotejagumali.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7290/files/32082941174.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/27793608690.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_off00006a8c.bin
e0fb3777b5cdd92b1202472b5928ed8253b6e8f76a0e109d50f226d8e3dcac0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8C 5504 bytes
font_01_sfnt_off00007d25.bin
2fa24dfeb4307140d14add32700073cddd85652fd4439d1f0265bf628c656f23
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D25 10264 bytes