Malicious PDF — malware analysis report

Static analysis result for SHA-256 3533c3a10dd73585…

MALICIOUS

PDF

40.6 KB Created: 2020-08-09 00:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a322ff393cd7ebeeefb98a1e7b72ad9d SHA-1: de948bc3cce1cf70e8c22e0a5f3854080e9ac0bc SHA-256: 3533c3a10dd735857f0922d25085637875f14d394ca3d24aae13ec89d31edea8
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The embedded links likely serve to distribute malicious content or engage in SEO manipulation. No scripts were extracted from this sample.

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.cc/pify?keyword=balantidium+coli+tratamiento+pdf
    • http://files.canisteowesleyanchurch.com/uploads/1/3/2/6/132682681/sulivi-kalobeleguse-xigegodol.pdf
    • http://files.andrewbknapp.com/uploads/1/3/1/6/131606392/8156334.pdf
    • http://files.kristinayee.com/uploads/1/3/0/8/130873943/fb7ff06a270927.pdf
    • https://cdn.shopify.com/s/files/1/0431/5935/5556/files/31962674138.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/capacity_management_in_operations_management.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/93330400018.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/2015_market_holidays.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/72583245540.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/83515364223.pdf
    • https://cdn.shopify.com/s/files/1/0439/3664/5275/files/88763678962.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/18125764360.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/bokogoxurofaralozuleko.pdf
    • https://cdn.shopify.com/s/files/1/0433/3820/3290/files/44727225215.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_off00006226.bin
8af4ba976cdd2518e7b1c9ab87a33e7f31579f74e6ed205c1294e2105d31d48b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6226 5172 bytes
font_01_sfnt_off000073a9.bin
67ca29f983be47442588dcec5d78171acd23659815df1fde949550561b2dba36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A9 10012 bytes

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