Malicious PDF — malware analysis report

Static analysis result for SHA-256 a804568f7201880c…

MALICIOUS

PDF

55.4 KB Created: 2020-08-20 14:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6b70f4a651f5c2c789734929bd7e133 SHA-1: 28517285fcbf7849d2271b812872b990d1b1cc4b SHA-256: a804568f7201880c65dec88e27ddd5919b65dbcdf88360727a5f18621c9a67b4
150 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.ru/pify?keyword=lose+yourself+tab+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=lose+yourself+tab+pdf
    • http://zamif.karinasfineart.com/uploads/1/3/1/4/131482933/lexudexuropurik.pdf
    • http://jewuk.viktoriaspaiser.com/uploads/1/3/0/9/130969744/4f41bc2a4b5c.pdf
    • http://files.rylandhowardaudio.com/uploads/1/3/1/4/131483343/4c07fe4af6d.pdf
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/felamafozomojuru.pdf
    • https://cdn.shopify.com/s/files/1/0430/6465/6026/files/acls_provider_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/23326241156.pdf
    • https://cdn.shopify.com/s/files/1/0430/7740/2778/files/79380240411.pdf
    • https://cdn.shopify.com/s/files/1/0433/4760/7720/files/asa_sample_paper_purdue.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/pegamozaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5473/4241/files/35021048687.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3933/files/zedinixunoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/83514446961.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bde.bin
b72f64eada337e1efaada8bfc8df32abc7712dd3d06e348bb038de01a1dd41cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDE 4948 bytes
font_01_sfnt_off00007cc3.bin
4a3e9fa114a124e589d346094d9e5dad1de96d2d3c77ff066a8ef67c5697bdc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC3 15572 bytes
font_02_sfnt_off0000ad8f.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD8F 16204 bytes
font_03_sfnt_off0000c2bf.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BF 4324 bytes

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