Malicious PDF — malware analysis report

Static analysis result for SHA-256 797c32e98562ab17…

MALICIOUS

PDF

49.7 KB Created: 2020-08-25 02:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d744bf7e7281f61eb3a7617846fe42b SHA-1: e74156b5f49a7a2cd9eff576645f1bc342429743 SHA-256: 797c32e98562ab17f4071fa52a6dabb338374e1197f2998d3639adea32fd1793
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the URL https://ttraff.cc/pify?keyword=hollow+knight+game+guide+pdf is part of known malicious infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'hollow knight game guide pdf', suggesting a phishing or scam attempt. The presence of numerous other PDF links further supports the classification as a link farm designed to distribute malicious content.

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=hollow+knight+game+guide+pdf
    • http://files.2redpens.com/uploads/1/3/1/8/131871740/ximilogupik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/fufiseze.pdf
    • https://cdn.shopify.com/s/files/1/0438/1065/2317/files/nogezavibo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7296/2203/files/5108076384.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/2228176899.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/67388291262.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/92706207032.pdf
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/wubimilipudasobesop.pdf
    • https://cdn.shopify.com/s/files/1/0437/1605/1096/files/291340430.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/2357484384.pdf
    • https://cdn.shopify.com/s/files/1/0436/0588/5090/files/juwazorusapev.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/96158107173.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007734.bin
8f1c59441a9d049a37dc768958f3d7a6d9104b6870f1937c26825b22bc19a3e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7734 5180 bytes
font_01_sfnt_off000088bc.bin
6f6f8596bf4312f52d637da6c76c47129f42e5cf0bc7cf52b4af9811615a9238		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88BC 10380 bytes
font_02_sfnt_off0000abfa.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABFA 4324 bytes

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