Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c04ed84c9083c2…

MALICIOUS

PDF

71.6 KB Created: 2020-08-08 22:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c75b2fbd129c43d967ffd927276b3cb6 SHA-1: 1d719048672802980691429d522c0661fc5d666c SHA-256: 69c04ed84c9083c281a91cd80ca4f3f741416f854d240f9312e215d8fe28c62b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains a large number of embedded links, many of which point to a link farm designed to distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL and other PDF filenames, suggesting a coordinated effort to drive traffic to potentially harmful sites.

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=brain+tumor+detection+using+image+segmentation+pdf
    • http://files.ulsupride.ca/uploads/1/3/1/6/131606819/nadogegigurude.pdf
    • http://xalewus.sheltonathleticclub.com/uploads/1/3/0/8/130813747/mopotidonug_zotowivav.pdf
    • http://files.visualsbyjacqui.com/uploads/1/3/0/7/130738562/mugerokinasi.pdf
    • http://files.thecookingkettle.com/uploads/1/3/1/4/131454035/kugijijuwi-donolusipipa-pogug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/bawediregow.pdf
    • https://cdn.shopify.com/s/files/1/0433/9718/5701/files/purolator_cross_reference.pdf
    • https://cdn.shopify.com/s/files/1/0447/9143/1325/files/99_names_of_allah_and_their_meanings_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6034/files/nigobaban.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/seismic_survey_for_oil_and_gas_exploration.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/gefiti.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/photoshop_2019_free.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/pengaruh_letak_geografis_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0429/0582/9532/files/38309171450.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4701/files/guwetelefunufupekuwefaxuz.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_off0000c04b.bin
3d61d2a09e0c9e1d1acb63a2c944555d51a61b2b253a7cb507f40dc68b34cc8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC04B 5492 bytes
font_01_sfnt_off0000d2e4.bin
3ec7b997be45399757afd4cfedcbe56b80d3d49136ab8f564c28c9f710bb4dd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E4 12812 bytes
font_02_sfnt_off0000fc00.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC00 16036 bytes

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