Malicious PDF — malware analysis report

Static analysis result for SHA-256 e231b43a026b1dbc…

MALICIOUS

PDF

34.0 KB Created: 2020-08-31 03:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8e1ddf3d89db1b5d904128a9f8fe53a SHA-1: 6f719c496eea0a7450ea20c4dba62dc02c143857 SHA-256: e231b43a026b1dbc58c6b73274034fd6283797a6121e01eff98b9a2a54bac209
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URLs, particularly the one pointing to 'ttraff.ru', are associated with malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the same URLs, suggesting an intent to lure users to external, potentially malicious, sites.

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.
  • 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.
  • 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=www+global+tempo+com
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/xurulizatusu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0806/3649/files/caterpillar_t30d_forklift_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2244/9820/files/28129854618.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f7a01b5f5764d67b1361fb8fb58ee63.pdf
    • https://static.usrfiles.com/ugd/97634b_3ac2fdcedb0946ed9e46d272d6dee9c3.pdf
    • https://static.usrfiles.com/ugd/d5415a_7b2e10c2a814420ab262eabcdafb98e2.pdf
    • https://static.usrfiles.com/ugd/d162e3_18608ce1140048609d9349e736dd0e09.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9acda9ffa934ff98a9452f81e46c4aa.pdf
    • https://cdn.shopify.com/s/files/1/0463/6085/4683/files/29421308081.pdf
    • https://cdn.shopify.com/s/files/1/0432/3888/3495/files/tamapikukekig.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/84675857118.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/trumpet_voluntary_brass_quintet.pdf
    • https://cdn.shopify.com/s/files/1/0434/8438/1337/files/23507789156.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_off00004709.bin
5ee787fc2d6362ee3d4f9e1d6b318be39ecadae4aeefd3b785d74aab31a7502b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4709 5224 bytes
font_01_sfnt_off000058de.bin
635f02924f9b069fb55585caa750290d05572040d16657e4498c8dcf98de0fc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58DE 10268 bytes

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