Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3afc8f927692bb9…

MALICIOUS

PDF

49.8 KB Created: 2020-08-22 02:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00d4792448ddc030332ae216e095f1e3 SHA-1: 586fff7964cb5b442cca4fbe839c44b1cae1cdd8 SHA-256: a3afc8f927692bb9e90990f7a0eca33306568075aa015326e687020c0cf8e149
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which further supports this attack pattern. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary malicious activity appears to be the distribution of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=narsingh+bhagwan+bhajan
    • http://files.allisonposeydesign.com/uploads/1/3/1/4/131438397/b67580d56b8406.pdf
    • http://vusop.greenhectares.org/uploads/1/3/1/6/131637814/0ae5e.pdf
    • http://wixexe.trupbsc.ca/uploads/1/3/1/0/131069869/4468639.pdf
    • http://wefuxu.studiojsd.com/uploads/1/3/1/4/131482976/misagumopitalab.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/49109197216.pdf
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/vizasoluxuzolabitotumo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1889/2958/files/47941489054.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0450/8686/7621/files/5955951442.pdf
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/78332214966.pdf
    • https://cdn.shopify.com/s/files/1/0436/0044/5597/files/49629522283.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/gesejovomerudumo.pdf
    • https://cdn.shopify.com/s/files/1/0450/6412/6616/files/accelerating_commercialisation_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/9978/3319/files/44812475856.pdf
    • https://cdn.shopify.com/s/files/1/0437/7133/0717/files/cascade_refrigeration_system_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/8739331390.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a87.bin
5f03d2c6bc08d28d18892b3fd5153044a2fff6aad81dd629dfd07635bf6cf50e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A87 2880 bytes
font_01_sfnt_off000064c4.bin
e1b5b498346322ada3f7e6a236e42ed6610438a81b0e71bba6f38b62a459ea4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C4 4672 bytes
font_02_sfnt_off00007493.bin
ff487803153ea4c27b114cbcc46449dde2f413615bd059d248a5e9c9daa121c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7493 9880 bytes
font_03_sfnt_off000096a6.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96A6 16164 bytes
font_04_sfnt_off0000abbb.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABBB 4324 bytes

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