Malicious PDF — malware analysis report

Static analysis result for SHA-256 be22403954b6c3a9…

MALICIOUS

PDF

51.8 KB Created: 2020-08-12 01:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0617925e273f79ea64b1197213e074f SHA-1: b4cea32f2077453fcb1a622ec58e3593c6716d6a SHA-256: be22403954b6c3a99e73165beaf94ae001086af06982d20d6d1ab4f0efc6833e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.ru/pify?keyword=andrea+dworkin+libros+pdf'. This suggests a link farm or SEO poisoning attack designed to redirect users to malicious content. 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.ru/pify?keyword=andrea+dworkin+libros+pdf
    • http://files.faneshafabreart.com/uploads/1/3/1/6/131637362/zonewusuvak.pdf
    • http://files.roundbedoasis.com/uploads/1/3/1/6/131606133/7813707.pdf
    • http://files.stepup4education.com/uploads/1/3/2/6/132695294/9259010.pdf
    • http://files.peggriffith.com/uploads/1/3/1/4/131483138/femekejuwivi.pdf
    • https://cdn.shopify.com/s/files/1/0447/9575/6693/files/alice_madness_returns_pc.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/29294177571.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87463685859.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/82394722099.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/42945997447.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/catalogo_hinode_peru_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/loruw.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/topikutedoduvu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/4832790778.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/fipagotuginakefum.pdf
    • https://cdn.shopify.com/s/files/1/0431/3523/8301/files/jewagobigukezefuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/52291559885.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/berigojipimukip.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
font_00_sfnt_off00006a03.bin
1571888cf1f0231caf8ac38792cf9127cc0d961a34bb1d48236c870ee8218ebf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A03 5320 bytes
font_01_sfnt_off00007c31.bin
f9917d13b8e9557388a2e04f1e953c8bf2f561b7adac39532e5ed65e49b7d7aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C31 10380 bytes
font_02_sfnt_off00009f7e.bin
40e67f78971ec7166ae62f30a55d65d7fec249a093ae94a7f0512261908444be
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7E 19864 bytes