Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c243db377bac9c…

MALICIOUS

PDF

52.3 KB Created: 2020-08-08 04:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e76e94da26f5b32afc1233951dee37ba SHA-1: a1590de08e5127fbb179b1c42021de8a3f378bbc SHA-256: f1c243db377bac9c6ad36cde470cb87f512d19bc9a56713839711d8836fd9f43
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This indicates the document is designed to redirect users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the attack vector.

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=the+algorithm+design+manual+solutions+pdf
    • http://files.nelecreativegroup.com/uploads/1/3/1/0/131070918/pogagojojolinag.pdf
    • http://files.buttonandspoon.ie/uploads/1/3/0/7/130775825/getofizoj.pdf
    • http://fewakusi.yeomanbeef.ca/uploads/1/3/0/7/130775413/vonof.pdf
    • http://nobuxara.fryeburgwaterdistrict.org/uploads/1/3/1/4/131438641/881ccb68.pdf
    • http://files.mariasgardencenter.com/uploads/1/3/2/7/132712096/panujagavixeter.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/42102443302.pdf
    • https://cdn.shopify.com/s/files/1/0433/9649/7573/files/vagafoki.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/cara_kerja_boiler_cfb.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/xutovixuneketaradukav.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/lscn_fishing_reports.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0412/files/46008371677.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/gallon_to_l.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8200/files/suluzosedipuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/herblore_osrs_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/jepewodapexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/50953366028.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/4277951932.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/76882302028.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070fc.bin
495f2dc1ee4e5553016e3233bd878d8e6f61f4c2f6b070f657998a49d7bd9d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FC 5404 bytes
font_01_sfnt_off0000832f.bin
d3718b2fcd9f2399a05e2caa69e9eddf7b16ff7db9a39865b0edb8b6fcc5384e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x832F 13720 bytes
font_02_sfnt_off0000ae83.bin
fb10e5badbbf29d6a05184c763452604a6d256f7c208a2bb674868c670b14a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE83 16144 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.