Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00421eb20c2dc33…

MALICIOUS

PDF

35.6 KB Created: 2020-08-23 11:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0250c0a51a5baee1705c813243ea2da SHA-1: d2aac5785a58cbedc285b93a3b6485244f16feaa SHA-256: f00421eb20c2dc3382e082589607a1abc480ad57705a9648b49603efbe270494
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify domains, suggesting a link farm or redirection strategy. 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=fundamental+theorem+of+calculus+worksheet
    • http://files.lolaandco.com.au/uploads/1/3/1/4/131437157/8545722.pdf
    • http://soseniwe.lifetimeepoxyfloors.com/uploads/1/3/0/7/130776321/0fb88f3881.pdf
    • http://minuj.pinkdaisyproject.com/uploads/1/3/1/4/131453459/38e4f7.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6127/files/cisco_asa_5512_firepower_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/1667/5740/files/92205697312.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/vokevowovaxexefulogerek.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3411/files/carers_allowance_forms.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/ziwaritetigikijizibasij.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3047/files/30552443655.pdf
    • https://cdn.shopify.com/s/files/1/0441/1057/7816/files/brachiaria_brizantha_marandu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/najiman.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/industrial_lubrication_oil_analysis_reference_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/arial_google_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/3771/8690/files/devour_barcelona_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/29134351747.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/77051549753.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_off000045cc.bin
d97578a4505254038cd6596a5298711bcb923a6ec4d0a281520a48a58daec043		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45CC 5204 bytes
font_01_sfnt_off00005762.bin
0ed0b24707915a665c789202d615fa5a6a0ba72cce7d6d337eeff3949bb2b47e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5762 8296 bytes
font_02_sfnt_off00007319.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7319 4324 bytes

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