Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd51916cdc48478b…

MALICIOUS

PDF

46.6 KB Created: 2020-08-09 03:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8b82569a1ea980a3bb7312cae623ab0 SHA-1: f25ca8082032ccbbc624b2f64fbdf662b7549472 SHA-256: bd51916cdc48478bbec7689a537b9454261cb83a0f44763af9fd6dd943895974
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=bailout+nation+pdf', is designed to redirect users to malicious infrastructure. The document also contains a large number of embedded links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning attempt to distribute the malicious PDF. 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=bailout+nation+pdf
    • http://files.adventure-and-salt.com/uploads/1/3/1/3/131380966/tazesivunuwirer.pdf
    • http://files.chadathaiusa.com/uploads/1/3/1/3/131378932/nikamudujowoze_bamiviterovunu.pdf
    • http://files.conradstroebel.com/uploads/1/3/0/8/130873822/9bcd0a9b.pdf
    • http://mafufij.bowenfineart.com/uploads/1/3/1/6/131606758/dalonixuwijimugolat.pdf
    • http://files.mta-sts.rollerstudija.com/uploads/1/3/0/7/130776393/napelanodi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/gevufunu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/47556356571.pdf
    • https://cdn.shopify.com/s/files/1/0431/2504/7463/files/64976746814.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8567/files/12663227243.pdf
    • https://cdn.shopify.com/s/files/1/0439/3366/3400/files/pijetununeri.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/jenuru.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/goronawom.pdf
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/kufebisaduxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/dazamijogolozukopila.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/481832512.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7166/files/87201471241.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/25434519548.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/brukner_and_khan_clinical_sports_medicine_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4789/4692/files/awkward_moments_children_s_bible.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_off00006c4c.bin
46e83c0167423b768be69e7107f4ec7c2990a63918df32803fae564d255dfed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4C 3396 bytes
font_01_sfnt_off0000785b.bin
b1b5357aee0e681836f854368f237758dc77798df791e923f5ae3c11e456e5f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785B 4808 bytes
font_02_sfnt_off000088d2.bin
7a04a26e9c3d314ccef554c7fc4ba9422b3a6b260d63d2ff4f8301eed30c5767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D2 10144 bytes

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