Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d9a747791a5a57…

MALICIOUS

PDF

43.6 KB Created: 2020-08-06 14:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b76f4d95d458cc57441d1a6857a2a074 SHA-1: c6572edad1a170dc1b4f566ef4a2b15e036339f3 SHA-256: 63d9a747791a5a57ba94ea5de3ce3b7ae0aabe193bd3d735baeec9fd269a28bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to mimic search results, ultimately redirecting to malicious infrastructure via 'ttraff.cc'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=oriflame+catalogue+april+2020+pdf+download', suggesting a lure related to a catalogue download. The presence of numerous external PDF links and the ML classifier's high confidence indicate malicious intent.

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=oriflame+catalogue+april+2020+pdf+download
    • http://files.callegarihorses.com/uploads/1/3/0/7/130775229/9726656d.pdf
    • http://files.onegratefulleader.com/uploads/1/3/1/4/131407214/d0332.pdf
    • http://files.vk3sn.net/uploads/1/3/1/8/131871894/d40f274a4b81b4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/pesobebilagalizakorirom.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/makix.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8165/files/sowefuzeli.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/mil_std_810e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/gabujezit.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6264/files/adobe_illustrator_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2099/files/xotasu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/75111700064.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/gefewemor.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/83402277964.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_off00005df1.bin
5659507ba8d9a63f6dda4faac1d752eee23276787120268a060385cefef24200		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF1 5572 bytes
font_01_sfnt_off000070e2.bin
473f675ce9c5f8736d41eabfb72842c49714b2a5dbc7d345ca890b47aa175dd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E2 10080 bytes
font_02_sfnt_off0000934b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x934B 4324 bytes

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