Malicious PDF — malware analysis report

Static analysis result for SHA-256 098361619cc31f5f…

MALICIOUS

PDF

48.8 KB Created: 2020-08-06 01:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c593195719961bf5e9c6aaddc0dbb81 SHA-1: 2ac16799533dffdedb32c2942acdbeef8864b347 SHA-256: 098361619cc31f5feddcc4f0e48284149bcc29c8edd78c9d3c674729f8c4d176
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary malicious URL identified is ttraff.ru, which is known to host malicious content. The document body, though heavily obfuscated, contains references to a diet book PDF and the URL itself, suggesting a lure to trick users into clicking the malicious link.

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.ru/pify?keyword=f+factor+diet+book+pdf
    • http://files.ncxctf.com/uploads/1/3/0/7/130775732/ranonojip.pdf
    • http://files.lightningridgerealestate.com.au/uploads/1/3/2/8/132815961/tuwor.pdf
    • http://files.iam4republicairways.com/uploads/1/3/2/3/132302871/8e5600451500.pdf
    • http://files.blueabstractart.com/uploads/1/3/1/8/131872178/76448.pdf
    • http://piwowene.caitlinpafford.com/uploads/1/3/1/3/131383651/tajejivegotelow-regiju-fukomofez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/53282054840.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/13671888879.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/1531070503.pdf
    • https://cdn.shopify.com/s/files/1/0434/8536/4390/files/89338326559.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/masonavuxuzediluwuzozimag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/10809735118.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/dipubipafizuzafovuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/87084785108.pdf
    • https://cdn.shopify.com/s/files/1/0446/6117/8521/files/steel_design_segui_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/0972/6888/files/gagirokafuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3561/files/complete_information_about_computer.pdf
    • https://cdn.shopify.com/s/files/1/0432/2797/1741/files/20444941060.pdf
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/gadelixex.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/jipugup.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000827e.bin
0b713a1825717025c4d08d08b66a405c08b454b43e37406fec2208260e963f56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827E 5100 bytes
font_01_sfnt_off000093e8.bin
7d9a5558cec6fc311a5b9cfd3cdad63653d9ff94fe355e6c3f2e231bfcaff36f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93E8 10024 bytes

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