Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd624a3e230ebac…

MALICIOUS

PDF

53.3 KB Created: 2020-09-03 08:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c479bee6a3b2e08f3cc09b05f70a3779 SHA-1: 406295dbc326f600cadc9d828045892a492c285e SHA-256: 9dd624a3e230ebaca8832570a3e6e142d0db8c6c442e99b9ddbfcafc62e4307b
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.link'. This indicates the document is designed to redirect users to a potentially harmful destination. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, suggesting an attempt to obscure the final malicious destination or leverage legitimate platforms for distribution. The ML classifier also strongly flagged this PDF as malicious.

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.link/wix?keyword=nightmare+on+elm+street+2010
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/33415239529.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1029/files/paradise_lost_book_2.pdf
    • https://cdn.shopify.com/s/files/1/0436/6021/4425/files/the_chronic_2001_zip.pdf
    • https://cdn.shopify.com/s/files/1/0430/3470/6083/files/vigiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/2827/4582/files/82390807391.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/serilotovusixupefab.pdf
    • https://cdn.shopify.com/s/files/1/0438/3762/0381/files/wovidaxofodudogexitudokab.pdf
    • https://cdn.shopify.com/s/files/1/0434/9627/6128/files/after_tome_1_en_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0434/9601/3990/files/doboloxamotog.pdf
    • https://cdn.shopify.com/s/files/1/0432/5251/4971/files/95854000943.pdf
    • https://cdn.shopify.com/s/files/1/0463/2674/3201/files/partnership_deed_format_in_english.pdf
    • https://static.usrfiles.com/ugd/e42c35_fd9c2d718fe04d94a92eff3c9a4f8373.pdf
    • https://static.usrfiles.com/ugd/b8c837_1786e8a9697c40ec83e66de10965cb1e.pdf
    • https://static.usrfiles.com/ugd/db93e9_b59505a8cc36450fa60a8448e42806b3.pdf
    • https://static.usrfiles.com/ugd/0779a3_9977586ad6e64cd09fb6df68fd859b9c.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
stream_005_off00009eb7.bin
05cf566c2de0cc57a416e89cd0067b566aa8a61f7dc58b34040738ade86522fe
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9EB7 23832 bytes
font_00_sfnt_off000068f1.bin
e05d87a8ca1933946d5967a83c6ef6e1fe8a7692d982edf42ce92f585e7fd737
pdf-font-stream PDF embedded font (sfnt) at offset 0x68F1 5396 bytes
font_01_sfnt_off00007b23.bin
a60721cb66c1a690fd6bd2b4dc952d8c0ff82e3c021acb198a3cb17b49e37387
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B23 10336 bytes