Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6411eed08ca18bb…

MALICIOUS

PDF

43.4 KB Created: 2020-08-30 16:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaefe276f8bc8aafee09c09e53cfa3f5 SHA-1: 223444afe983cc360682ef5217b3e4778535b55d SHA-256: f6411eed08ca18bbf2b7730759bec35c831865006c87cb60455bac81b48beecc
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL and references 'Dragon ball super dubbed torrent', suggesting a lure to attract clicks. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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=dragon+ball+super+dubbed+torrent
    • https://static.usrfiles.com/ugd/b8c837_b388b01f7f8748ac9f6e493b41fbc52f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b807141955ef4b10b45a1f6f3750c3ad.pdf
    • https://static.usrfiles.com/ugd/4b68be_6ea7037749b04a4abc293e42c34b20c2.pdf
    • https://static.usrfiles.com/ugd/5ecadc_cb9e03ab8b5a4c19920bdcad2172008e.pdf
    • https://static.usrfiles.com/ugd/0049ca_8df5e5d50b8e43529ce07af320869412.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/31477440628.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4665/files/48631716781.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/hebrew_flashcards.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/vazijugutigipigikewuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7216/7841/files/48534639850.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_off000060a3.bin
aa5b3e62ddc86255c7e78ade6350497e2a8c807470ede113e0ca3d716dcd4789		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A3 5268 bytes
font_01_sfnt_off0000728c.bin
dd89c1ab0e8d1a91aa49650f1d7dfd79ec76462c3af9788dbf6c66a2c74b72b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x728C 15032 bytes

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