Malicious PDF — malware analysis report

Static analysis result for SHA-256 859f90e9c9d6ee65…

MALICIOUS

PDF

42.4 KB Created: 2020-08-03 11:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e4c6aa6907ba9fdd85c3952a5654726 SHA-1: 74c08326736353b7d49be03b5fd620f4ac04a3fd SHA-256: 859f90e9c9d6ee658cad6ebabbf1d9562bf1d657a42ad6b747d97592166b0cb5
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=indesign+cs6+cracked'. This indicates the document is designed to trick users into visiting a site offering cracked software, likely as a lure for further malicious activity. The ML classifier also strongly flagged this PDF as malicious.

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=indesign+cs6+cracked
    • http://files.mancostrails.org/uploads/1/3/1/4/131407530/29f0c433d2a9255.pdf
    • http://files.hannahschenk.com/uploads/1/3/0/7/130738548/rexope.pdf
    • http://files.theindependentbookseller.com/uploads/1/3/1/4/131453198/6096254.pdf
    • http://files.activesupportresource.net.au/uploads/1/3/1/4/131437443/jaxuwesovor-rovomututovofi-gazokodafazonig.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/68969251355.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/korodejamisupovokekativab.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4665/files/62155250831.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/nintendo_switch_dns_2110_3127.pdf
    • https://cdn.shopify.com/s/files/1/0434/7428/8793/files/pokemon_leaf_green_codebreaker_codes.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/22695228081.pdf
    • https://cdn.shopify.com/s/files/1/0428/3986/7559/files/jotixapularasekirusok.pdf
    • https://cdn.shopify.com/s/files/1/0440/1109/4174/files/82259485374.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4938/files/45633179187.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesitoxerevujadutag.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879e

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a1.bin
541321ae98577304b2400ff2e1648fa629e81c79d743c0688614abffa686d8de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A1 5232 bytes
font_01_sfnt_off00007885.bin
b526ed4834d06c9db59fe6e2a44516812f237fceba68e827c7abf466b7a919a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7885 10528 bytes

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