Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ae6f2ad3767251…

MALICIOUS

PDF

71.1 KB Created: 2020-08-06 00:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bf935d82e4ae7a4d0848656fc6b0926 SHA-1: 2957f7fdbf2c9247e7f70dd52aca31039999d893 SHA-256: 49ae6f2ad3767251fb2e2a6d19df5b5e05080b81b7e17525424a28b48e2afb7a
154 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.cc/pify?keyword=agonistas+colinergicos+pdf'. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, with the dominant host being 'cdn.shopify.com'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting the primary intent is to redirect users to malicious infrastructure.

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=agonistas+colinergicos+pdf
    • http://files.ncclosingattorneybestpractices.org/uploads/1/3/1/3/131378780/1324396.pdf
    • http://files.softballandsnakes.com/uploads/1/3/1/4/131453062/7504119.pdf
    • http://files.belfaststar.org/uploads/1/3/0/7/130739074/7943691.pdf
    • http://files.shopelevateonline.com/uploads/1/3/0/8/130813654/fezelumaxebit.pdf
    • https://cdn.shopify.com/s/files/1/0433/6146/8574/files/95715434724.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/23425961699.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/ruxufepurukufibojaxisam.pdf
    • https://cdn.shopify.com/s/files/1/0428/5648/0935/files/walamileson.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/vevarumilaketosafiwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3073/files/james_garner_height.pdf
    • https://cdn.shopify.com/s/files/1/0439/5650/2686/files/the_apocryphal_new_testament.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/46041068640.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4650/files/soromiwibugemifafuwesozu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/five_nights_at_freddy_s_minecraft_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/66054545538.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/kuxokiguredarevibisa.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_off0000cf89.bin
d9c5dcc2327a00ef3bd9f69705cf9ff1a7404fb33a7a2e285c76a9338e740334		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF89 2216 bytes
font_01_sfnt_off0000d98f.bin
63eb1d51a8dfe6134f9ec08a26c1ee0b2137ad4083006e4c4e79771510762b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD98F 5312 bytes
font_02_sfnt_off0000ebb8.bin
7c0a839e25a18d0d7f94a8c074850c030a50e578de07a77783cd99ec5fccf3c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB8 10284 bytes

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