Malicious PDF — malware analysis report

Static analysis result for SHA-256 434f8297e61e5884…

MALICIOUS

PDF

48.0 KB Created: 2020-08-29 14:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dc214da4b3fbd1021a003d05aa6e83a SHA-1: 5119b0b836c43a142c549aab3c8df209eb3a0e1d SHA-256: 434f8297e61e58848d931b49e8dceacf2ba5ea13f486668c0d2e87b44f8093cb
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector. The document body, though heavily obfuscated, includes the URL 'https://ttraff.cc/wix?keyword=sky+factory+3+extreme+reactors+guide', suggesting a lure to external content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of this URL. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates the presence of numerous external links, likely for SEO manipulation or to distribute 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.cc/wix?keyword=sky+factory+3+extreme+reactors+guide
    • https://static.usrfiles.com/ugd/b8c837_c7d1ec383439454f8aa18a8951e5aa54.pdf
    • https://static.usrfiles.com/ugd/b8c837_004b04228d004325abd11dc9426fcc80.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0ce30be00e344cbada7ca0ea8cfc5bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_99c392296dbf4d24ac4d164e98b1cf7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_23a055ba82364faa9aee6e7df11a00e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_19e102540730479fa24403e4e216ae7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_94873d6420b6408291bef7a9084a226b.pdf
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/53965268195.pdf
    • https://cdn.shopify.com/s/files/1/0434/1353/6935/files/javusazipotejuruvowa.pdf
    • https://static.usrfiles.com/ugd/b8c837_212b67f6c3c443baa6f3cc1608c4a70e.pdf
    • https://static.usrfiles.com/ugd/8e1900_791e67ddb04e47ff8990d91167265044.pdf
    • https://static.usrfiles.com/ugd/299074_7b7def9478674cbca6ed0a2dd5beb2a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_abb715f4e3aa43a9b7a73ebd4768e94e.pdf
    • https://static.usrfiles.com/ugd/34ec99_68618394a7a440bab7c8b56040f7d25f.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_off00007bcd.bin
5732391fb30faea64e247c0897e68172358ba485d26cb9c1e74573cfe3986c98
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCD 5812 bytes
font_01_sfnt_off00008f7e.bin
4296f40ed651ba50b805e05bf66e063c829b73dffe398cdb260c02dac7b4f4d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7E 10280 bytes