Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc808d5e76f8182…

MALICIOUS

PDF

50.6 KB Created: 2020-08-29 05:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d246e7e0d40a3a0293c1411fb1991517 SHA-1: 8a8fe981ba1a79f454d38137a52b596e832e67b4 SHA-256: bcc808d5e76f81826d3fbd75c06007c3d86f47eac8f3ddce29e85e602f1f5a0d
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a phishing or malware download page. The document body, though heavily obfuscated, appears to contain the same URL and references to a recipe, suggesting a lure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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/wix?keyword=recette+tarte+tatin+authentique
    • https://static.usrfiles.com/ugd/b8c837_b4c44efe4ad84f37af5feb168a81ae37.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc230a8c88da4196b4663558725cd998.pdf
    • https://static.usrfiles.com/ugd/b8c837_546a959a32ee4409940b3e28b5af5737.pdf
    • https://static.usrfiles.com/ugd/b8c837_685805a2e6f94bc3a55f425cf588e642.pdf
    • https://static.usrfiles.com/ugd/b8c837_48fe4696d326493eaa4a37a99cf9180e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a894635b6aa4afaa3b674279dc55d6f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1779f72805b5484d8595fa4a2d796370.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0165/files/82839889700.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/convention_on_biological_diversity_text.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/70351346311.pdf
    • https://cdn.shopify.com/s/files/1/0449/6615/0303/files/rapprochement_bancaire_ohada.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b2affc28d424d37883529a506e8c575.pdf
    • https://static.usrfiles.com/ugd/b8c837_4de5c01c304244a2830e8bc241186176.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a26b9393fed4c54a66499e581cfbdc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9041e3a4ecf47f2bb1f5f26774a73c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f387e4aade1d4fa9b16ff9bab8f379b8.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006392.bin
5655ad1e1aecb5cbc121bdd33f4fc49a1db836d443a80dbeb03ba6c7d3ae1009		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6392 4580 bytes
font_01_sfnt_off0000731b.bin
af9ada451def796e3f8827831a9ffd08e0fd17a65e10a85be22b7c8953dcf753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731B 11800 bytes
font_02_sfnt_off00009863.bin
03928253ee2cb1fef248e02a9a6434000674c6c2dfc7f61f5290e699cd36adc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9863 16088 bytes
font_03_sfnt_off0000ad17.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD17 4324 bytes

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