Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbf3dab3893d73b…

MALICIOUS

PDF

45.9 KB Created: 2020-09-06 03:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3775525e46aece648f06722234b57d0a SHA-1: b97f43a1f05c0e2b2cbcc699aca52eb7655b9f6f SHA-256: 4bbf3dab3893d73bafbdd4efea970a060f26926063d99ba3229ef50e74448bb0
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=sand+balls+game+free', which is likely intended to lead the user to a malicious site. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning attempt to drive traffic to the redirector.

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.club/wix?keyword=sand+balls+game+free
    • https://static.usrfiles.com/ugd/a07927_fc4fe2f0dece4d0789caec198d7cf692.pdf
    • https://static.usrfiles.com/ugd/b8c837_44121cb3184d4762b3b64512f465a8bb.pdf
    • https://static.usrfiles.com/ugd/564d2e_2ae6009372ba4fb1ac4cb0e8f34741b1.pdf
    • https://static.usrfiles.com/ugd/ca32a8_69e8e6d9ddcf4e229f57903f54a7dbf5.pdf
    • https://static.usrfiles.com/ugd/769f78_c7d96f83765648c6930a51fe6da01c91.pdf
    • https://cdn.shopify.com/s/files/1/0434/7484/5858/files/word_analogies.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/bakawijiposuvoritokoju.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/kuzikafunej.pdf
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/where_is_tony_beets_from.pdf
    • https://static.usrfiles.com/ugd/aaaf79_8aac97b1d84c45b5933275cfe241da8c.pdf
    • https://static.usrfiles.com/ugd/45e30f_9f732aac5c2e43b8a54dadc2fba8778b.pdf
    • https://static.usrfiles.com/ugd/48d9a1_6e85ecfca082409d885ca1f926257914.pdf
    • https://static.usrfiles.com/ugd/607883_8a57944f247948ccb80ad54bf5e5e2c1.pdf
    • https://static.usrfiles.com/ugd/f2ef67_6ed4eda0b4be4abcb7ced50e3f9dd1d5.pdf
    • https://cdn.shopify.com/s/files/1/0436/0388/6238/files/rovexirijadeki.pdf
    • https://cdn.shopify.com/s/files/1/0461/3419/8425/files/collectible_plate_price_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/memaxepesolujin.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/everstar_mpm_08cr_bb4_manual.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_off00005d72.bin
d5c2a5c9b10c839728921e63df5a262501a08d61d4739ccdbb6276a46b18315b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D72 5468 bytes
font_01_sfnt_off00006fef.bin
152d8d359e1cc343aed615bbf4c173786318bc49ae0d8c53f373889d34dcef09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEF 10760 bytes
font_02_sfnt_off000094e6.bin
94d3cb1cb955e79326becda893dbc28162358a0598f3d436d9ab749bffec2032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94E6 16392 bytes

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