Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c611ca54627bd2a…

MALICIOUS

PDF

57.2 KB Created: 2020-08-29 10:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d37055317523737f0618f4f9098beafc SHA-1: 0c9e711d618e752fe7e3230c8962a6c9abee6b6f SHA-256: 2c611ca54627bd2a54a4f38ed15788051d3cd34d8991199c7ada5ad81372779d
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains references to the URL and other PDF links, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is part of a phishing or redirection attack.

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.cc/wix?keyword=the+witcher+3+armor+sets+list
    • https://static.usrfiles.com/ugd/b8c837_ce6eef643ae1473992e4e40a475ccbc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d8a2d61ca7443adb6fc1a05c5d2f4b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9096d5bc6f8d4641a47c47d913564d34.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f700fda0db94bf797f45cd2d5356225.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a6e593227de4e2e8719c2da2bdf19a4.pdf
    • https://cdn.shopify.com/s/files/1/0448/0057/3601/files/wow_elemental_shaman_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0441/1470/6584/files/saarc_agriculture_information_center.pdf
    • https://cdn.shopify.com/s/files/1/0460/9107/5748/files/fadeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/5029/4678/files/33797050371.pdf
    • https://cdn.shopify.com/s/files/1/0435/0358/3384/files/64371721332.pdf
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/18937749178.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2871/files/49057212049.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/sokedog.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1968/files/vasidino.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8241/files/sony_mdr_zx110_review.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/60414460070.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a2ee.bin
92748a03d33f78914a9f7aa99c14844d696bbf4c8e9d1352fdbfdf620106e2a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2EE 5244 bytes
font_01_sfnt_off0000b4ae.bin
ef5875d26eb11a17e2a6c7e19581cc39de131f68e31af95980d75e68425af4e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AE 10248 bytes