Malicious PDF — malware analysis report

Static analysis result for SHA-256 c40d35def5fe4026…

MALICIOUS

PDF

38.7 KB Created: 2020-11-04 08:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 557ffa382669bd8fd6ec845595ad93a3 SHA-1: 1b35f761bbd675a3ede13c40468446802d881c6d SHA-256: c40d35def5fe40267dea6dbd095e39754d6e96ea60977d28bdb6481dd655c6f4
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/aws?keyword=st+marys+cemetery+missouri'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to redirect to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/aws?keyword=st+marys+cemetery+missouri
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f94688a0a25d.pdf
    • https://wajusozoxedaxu.weebly.com/uploads/1/3/4/2/134235608/motuvusuwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0504/1772/9723/files/96754021828.pdf
    • https://s3.amazonaws.com/fejenijovekozu/52649863179.pdf
    • https://s3.amazonaws.com/jeduzizonox/coin_master_cheats_hunter.pdf
    • https://s3.amazonaws.com/tetenifeme/41755069731.pdf
    • https://s3.amazonaws.com/lurutopobi/hack_war_robots.com.pdf
    • https://s3.amazonaws.com/tuxutedi/nazagitaxediwujo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/wujatumegenufufezabimu.pdf
    • https://s3.amazonaws.com/xafaxotaful/the_joy_of_php.pdf
    • https://s3.amazonaws.com/kakef/evansville_indiana_warrant_search.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_off0000560f.bin
d7e6a1b477a4462abafb5f7131320b2805cd9a68b65b8af4d94af5b280cdaff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560F 5120 bytes
font_01_sfnt_off00006762.bin
2382d810763559cb324479d29e2fb88845575cf829d035adb2505f114b31bbe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6762 11520 bytes

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