Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d19a5a75ef7fbc6…

MALICIOUS

PDF

46.9 KB Created: 2020-08-09 02:40:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 129719a66efc8ae0e8c3fa715994e359 SHA-1: b319f961711b483b19111219952536f7e0827466 SHA-256: 0d19a5a75ef7fbc68e8ca4c48f4a794318533a89651d48c6c0e476aed379ff09
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=zoology+pdf+miller', indicating a probable attempt to lead the user to malicious content. 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=zoology+pdf+miller
    • http://files.cinkitchallenge.com/uploads/1/3/1/3/131383651/7417951.pdf
    • http://vuxito.shine-bu.com/uploads/1/3/1/3/131383483/nobelupuzixatub_turoxodig_pivixapuwor.pdf
    • http://files.atlantabeautyconnection.com/uploads/1/3/1/8/131860479/4986417.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3972/7509/files/correlation_matrix_r.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/80288740020.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/pupalizomoposifikite.pdf
    • https://cdn.shopify.com/s/files/1/0438/9987/9576/files/beast_conclave_5e.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/boruzizurano.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6384/files/rujisatamozazopijot.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/9092961026.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/asuhan_keperawatan_atresia_ani.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1139/files/honeywell_pro_series_thermostat_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/66149203205.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5324/files/8085_microprocessor_addressing_modes.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006463.bin
78eb26367237f73bada41b7fe721334f51189bb29b5fe1f4fcf142e777028c1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6463 5032 bytes
font_01_sfnt_off00007584.bin
8bc6a3843872fa6b7c76936045c9523df7351f762c510ec37c61ab3e2e9efa64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7584 10540 bytes
font_02_sfnt_off00009995.bin
0994b000c5aa335cfb078c19eada686630c11789b858f732db486bdd644d2c4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9995 16120 bytes

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