Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92eabcee6b4306b…

MALICIOUS

PDF

42.8 KB Created: 2020-08-14 20:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7aaa9c093f2c6f36cdb5a3e2ec2cb96 SHA-1: 14d0ab3495a0b748e3874cdfb55f13792f62f442 SHA-256: e92eabcee6b4306bf9375e00dcbb871c9a13484009accb8013832937d67bc765
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Lineage 2 ertheia quest guide' and the malicious URL, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many pointing to Shopify, likely to obscure the malicious redirector. The ML_NYX_PDF_MALICIOUS heuristic further confirms the malicious nature of the PDF.

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=lineage+2+ertheia+quest+guide
    • http://files.dukeengagedetroit.org/uploads/1/3/1/8/131871501/faluwis.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/84402858513.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/vfs_appointment_letter_password.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/vatoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/6562/2184/files/12923483719.pdf
    • https://cdn.shopify.com/s/files/1/0429/0769/7305/files/16143643216.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3330/files/91496003974.pdf
    • https://cdn.shopify.com/s/files/1/0435/5814/2120/files/53561606697.pdf
    • https://cdn.shopify.com/s/files/1/0436/9793/0393/files/7476482376.pdf
    • https://cdn.shopify.com/s/files/1/0439/0813/7128/files/kate_turabian_a_manual_for_writers.pdf
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/learn_english_grammar_in_gujarati_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9465/3594/files/5.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4056/files/15412735673.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/lavepisolona.pdf
    • https://cdn.shopify.com/s/files/1/0438/3227/9200/files/51484450188.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_off000069fc.bin
ff3a65f402022695ef5a1f6cdceca02477631cb9b2b8ea4d5ec131a4871413e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x69FC 5256 bytes
font_01_sfnt_off00007bc9.bin
c1dbb25494f79221ed5d9e8c5f5b3cea09ac3055aae3c3b826bdff9c5e154443
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC9 10192 bytes