Malicious PDF — malware analysis report

Static analysis result for SHA-256 966a4b34c19fafb7…

MALICIOUS

PDF

46.7 KB Created: 2020-08-17 09:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c47ed732be0b66c2405982ac0826b7cf SHA-1: e34243355075b3f8db9cacc6cdfbd1742e8f9546 SHA-256: 966a4b34c19fafb7a4de450682d47dbc6bb224c2d5a3058a764e4b04e7e3d1fa
150 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, with numerous embedded URLs. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one of these links points to known malicious infrastructure, specifically 'https://ttraff.ru/pify?keyword=burner+app+apk'. The presence of a large number of links, including those hosted on cdn.shopify.com, suggests an attempt to obscure the true destination or to leverage SEO tactics for distribution. 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=burner+app+apk
    • http://files.teptu.com/uploads/1/3/2/8/132815342/3308355.pdf
    • http://files.oldtippecanoequiltguild.org/uploads/1/3/1/3/131398504/sozurapiporijux-julivelarexe.pdf
    • http://files.longbeachcoastalchallenge.com/uploads/1/3/0/8/130814014/bezeneforilo_wejefovajinasu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/7749216007.pdf
    • https://cdn.shopify.com/s/files/1/0444/3914/2566/files/bullworker_steel_bow.pdf
    • https://cdn.shopify.com/s/files/1/0431/8520/9507/files/mewad.pdf
    • https://cdn.shopify.com/s/files/1/0433/7057/8070/files/epidemiology_and_biostatistics_for_the_usmle.pdf
    • https://cdn.shopify.com/s/files/1/0440/0598/2366/files/43912852617.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/panilisekabeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/biology_investigatory_project.pdf
    • https://cdn.shopify.com/s/files/1/0440/5533/0966/files/nofopudorikuxolu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/xaxibokamidaru.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/kozoname.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/25716392347.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/28305151253.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_off000064f0.bin
aadc554f32bdc927565365873fbdf21806b91b4c7fde06a5cd810c01e64bb3d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F0 4716 bytes
font_01_sfnt_off0000750c.bin
80a30be41061af0171bcd80f625ded7593934bd6f74a61433fb9d56bbb277b2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x750C 10516 bytes
font_02_sfnt_off00009905.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
pdf-font-stream PDF embedded font (sfnt) at offset 0x9905 16092 bytes