Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d25290bc3676e46…

MALICIOUS

PDF

55.4 KB Created: 2020-08-07 06:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 058de63763964ffacd9ee85fc88df57b SHA-1: 09ea9da891a3828df15f72b8f608802ce326b059 SHA-256: 0d25290bc3676e46da9fc50fd8f82e88bc95c657c11f09d6621763e46862e130
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=12th centum scored answer papers pdf download`. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to download potentially malicious content. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic to distribute malicious files.

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=12th+centum+scored+answer+papers+pdf+download
    • http://files.watar-ksa.com/uploads/1/3/1/6/131606890/8159576ca6ca35a.pdf
    • http://files.nadinesteklenski.com/uploads/1/3/0/7/130739116/nesud-fazifam-runezux.pdf
    • http://riwetomo.michellecurticeskin.com/uploads/1/3/1/1/131163599/rutakuvume.pdf
    • http://files.neurothinktank.com/uploads/1/3/1/6/131606128/dusewomotaxike_pizewa_zopurirug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3893/1109/files/fetawopini.pdf
    • https://cdn.shopify.com/s/files/1/0430/8579/1393/files/99130619421.pdf
    • https://cdn.shopify.com/s/files/1/0434/6036/2392/files/2519629768.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/80640676624.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/dazunawa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/maxalokozukosadij.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/bibilitataz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/mixing_audio.pdf
    • https://cdn.shopify.com/s/files/1/0429/2152/5407/files/automate_excel_print_to.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0742/files/alkaloid_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/rujikusijudobu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/meyers_snow_plows_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0429/7595/3049/files/football_today_xbmc.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/mumetofaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/bukowski_poetry.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_off0000846c.bin
f055f893371e6045a569222483fd43ad5830c607942ee8a4ab5ed59309499875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x846C 5576 bytes
font_01_sfnt_off00009751.bin
a61b077f0c58b1eb49c2e7cfb84e89feda5300fc16c31dfe944d601f3e828629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9751 10160 bytes
font_02_sfnt_off0000ba2f.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2F 16164 bytes

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