Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3b7512383579e8…

MALICIOUS

PDF

66.4 KB Created: 2020-08-19 09:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f1be3d275ed07e628feadf38a5f1e27 SHA-1: 96c41b1e7c2bc67a6daf01dcb9faa5d0afd6af67 SHA-256: db3b7512383579e878d0bec5acd02b884eaae3cd606a25d7a69712991ffb52a6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded links that point to a malicious redirector (ttraff.ru) and a large number of other PDFs hosted on Shopify. The primary lure is the promise of free technology PowerPoint templates. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector link confirms a delivery mechanism designed to lead users to harmful content. No scripts were extracted, but the PDF structure itself is used for malicious redirection and hosting.

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=technology+ppt+templates+free
    • http://fizoroti.andreavargasportfolio.com/uploads/1/3/1/3/131384635/sojuzelukuge.pdf
    • http://files.usedcarsfortrade.com/uploads/1/3/2/6/132681325/8419741.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3144/files/dudumukujum.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/hospital_waste_management_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0434/1976/2840/files/50710677019.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.pdf
    • https://cdn.shopify.com/s/files/1/0448/8544/2727/files/jonovozatezep.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/30945894133.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4552/files/kamagalinowerasope.pdf
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/jokabemege.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b368.bin
204e0a9a946737f3f5b07d72ad55b23e43370e4861181e08b0c51d47a2aadd3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB368 5220 bytes
font_01_sfnt_off0000c4fc.bin
ae85d598512c051927a21c1d6d1c78c53ec03d9fa4029353f08cce472dd27a77
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FC 13048 bytes
font_02_sfnt_off0000eeeb.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 4324 bytes