Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2da76bb9a47d2e4…

MALICIOUS

PDF

33.7 KB Created: 2020-08-07 02:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0553082ec5a9d7f2b100219ad188d87 SHA-1: 13fd4e39db87dc50002f6e7c84cb1fb3ef8aedc2 SHA-256: d2da76bb9a47d2e4bb40dce3f63addd3508778e1d592065ae1aa6ea7d24083eb
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=bsp+fittings+catalogue+pdf'. Another critical heuristic identified a mass external PDF link farm, suggesting an attempt to manipulate search engine results or distribute content across many sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the malicious redirection links.

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.com/pify?keyword=bsp+fittings+catalogue+pdf
    • http://files.tripsandtours.com.ar/uploads/1/3/1/4/131437174/pexiwakemi_bigemese_ruforaxesatafeb_xumujavawip.pdf
    • http://jivow.crossroadsmotors.us/uploads/1/3/0/7/130776394/4301837.pdf
    • http://files.designphotographyusa.com/uploads/1/3/1/0/131071056/ginepe_lumetadolevo_pobapijujiraf.pdf
    • http://files.ekoforteang.net/uploads/1/3/1/3/131397934/liloxazuref.pdf
    • http://files.davidpettinicchio.com/uploads/1/3/0/8/130874566/ca2125d5.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/isotropic_orthotropic_and_anisotropic_materials.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1562/files/64288820250.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/21357054015.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/borg_dyspnea_scale.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/ti-_36x_pro_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/88473098464.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/pelisuvopulisogoxabux.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/44124254843.pdf
    • https://cdn.shopify.com/s/files/1/0432/8534/8510/files/balidageboloxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/62366874231.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/58788139345.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/fizule.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/9373761771.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_off0000493c.bin
a4af3962ceb1320da702b486b6794cfdce6c981fef7727c9e7b1a62cb16b6e4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x493C 5276 bytes
font_01_sfnt_off00005b50.bin
98ab3f2a61ef4cad30b896f908a4a13ee1b936a68499e0c0008db81bf1e0605f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B50 8960 bytes