Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98d47ada5cd487d…

MALICIOUS

PDF

45.9 KB Created: 2020-08-06 22:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36c2c0a1105d96c048b4c9c971b36428 SHA-1: 6f4b35c2c1628c2bce6ff7e69caf11ef887ee048 SHA-256: c98d47ada5cd487dab2a0de2fd17527c060c25ecb93d745ea342beb405bae53f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link farm and a direct link to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains text related to a 'Bicester village vip card invitation 2020 pdf', suggesting a lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links points to a link farm or redirection strategy.

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=bicester+village+vip+card+invitation+2020+pdf
    • http://files.jazzlegaspi.com/uploads/1/3/1/4/131453817/rugopotodurewumodim.pdf
    • http://files.deadlinecustoms.com/uploads/1/3/2/3/132303151/sawazaketigube.pdf
    • http://files.jessicatruscott.com/uploads/1/3/1/6/131606035/8328657.pdf
    • http://files.naopuppet.com/uploads/1/3/1/1/131164431/kidivegeke.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0166/files/5535754038.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6507/files/32211368480.pdf
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/university_of_south_carolina_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/anti_money_laundering_act_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/dirudipifaxotuviwibugapux.pdf
    • https://cdn.shopify.com/s/files/1/0436/4831/9638/files/powexijedi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/27810037879.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3499/files/gibugejadofosaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5557/0341/files/tezatofixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/52144308100.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/driver_license_texas_renew.pdf
    • https://cdn.shopify.com/s/files/1/0435/6587/5359/files/ximufes.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_off000064ad.bin
6f6c5a8fb5e62cfd2b6ff76f758e0f05a98695d5bac735cd019a42cb5e5649ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AD 2952 bytes
font_01_sfnt_off00006f3a.bin
fbb5c91ba4e02954eb461921d81adf022a21effca70b9b821aa12c33e7e8bcbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3A 5708 bytes
font_02_sfnt_off000082c5.bin
e3a825604631c2f22733b393e461cb12db83724ba0454748fa6e41e76bdb0db5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C5 11104 bytes

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