Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfb4f564c65287d…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 23:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecb28f10232c6ba6b6218620c5bc3b3e SHA-1: ba58a0792699e91f612341d92d01850a1e378bd2 SHA-256: 9dfb4f564c65287d29a6bc042135bde8c90c50e50320178809a343df0f4e5225
154 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.me, which is likely used to obscure the final destination and potentially deliver malware. The document body, though heavily obfuscated, contains the same lure text as the URL, suggesting a social engineering attempt to trick users into clicking the link. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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.me/wix?keyword=animus+stand+alone+apk+obb+mega
    • https://static.usrfiles.com/ugd/b8c837_25f619fe66cf499da623bac0f75446b7.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_c8f45bd880c54cbd9e17a3f943d2d81f.pdf
    • https://static.usrfiles.com/ugd/f55bec_822d0d0c73cb45bfb6c229634fcfc929.pdf
    • https://static.usrfiles.com/ugd/3b47cb_0a4dbeb5313b4439897d7cef5dfaf9bd.pdf
    • https://static.usrfiles.com/ugd/1a89c8_f521d60dcd3d410092c5e2c47b4c9c89.pdf
    • https://static.usrfiles.com/ugd/5899d5_ea86a30178e94a848a9c3f83337546d1.pdf
    • https://static.usrfiles.com/ugd/7f16bd_24405e030276423e8a9ed4c217da7160.pdf
    • https://static.usrfiles.com/ugd/b8c837_4467c5b00ebe4e0292dafdbfc202cd1a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f6f58cfee424e95ae9ed891783f35a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecb7db2ebfd14b9392d61fde998c4381.pdf
    • https://static.usrfiles.com/ugd/de65f7_089144b0efc14cae807a93230054c273.pdf
    • https://static.usrfiles.com/ugd/97493d_21909f3ac75446a0abeecea61a746c0d.pdf
    • https://static.usrfiles.com/ugd/d216cb_ffd5b2a4169843e2a91af31687cf26a6.pdf
    • https://static.usrfiles.com/ugd/97368a_48e89df5dd014cada86560fed1c593ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7e4032911c447a1b1c289acb84cc05b.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_off0000581f.bin
3be304e7fcbdd8ab0bb29c2cb6405e7e6c3e4fe3510a0090915feb4c9db856b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x581F 5260 bytes
font_01_sfnt_off000069df.bin
cacea23f2ba2b55b17df9c21ca25097673e041e9852af110a51e998f7758453b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 10540 bytes
font_02_sfnt_off00008d43.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D43 4324 bytes

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