Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d4727fa833740d…

MALICIOUS

PDF

39.7 KB Created: 2020-08-20 23:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9768cd05d901eadfe512011b2542db66 SHA-1: f81168940ad99343abf6403cfbef4a48a326676f SHA-256: 43d4727fa833740d51045c5c3611c43d3c85beffe556749c27ee92521aaa3d44
150 Risk Score

Malware Insights

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

The PDF was flagged for containing malicious redirector links and a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://ttraff.com/pify?keyword=bakkhali+song++djpunjab. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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=bakkhali+song++djpunjab
    • http://files.swrgcwomen.org/uploads/1/3/1/4/131452942/1417300.pdf
    • http://files.fiberenvy.net/uploads/1/3/1/6/131606349/5094ac66492a.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/98637583467.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1569/files/complete_virtual_reality_and_augmented_reality_development_with_unity.pdf
    • https://cdn.shopify.com/s/files/1/0440/4104/4118/files/veduvig.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0803/files/lixixupitij.pdf
    • https://cdn.shopify.com/s/files/1/0437/6195/9061/files/process_of_qualitative_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0438/8595/3192/files/kupijazawopatote.pdf
    • https://cdn.shopify.com/s/files/1/0429/3869/5846/files/67298870151.pdf
    • https://cdn.shopify.com/s/files/1/0433/9974/1596/files/juzusasiduduz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/77638911070.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/gewujab.pdf
    • https://cdn.shopify.com/s/files/1/0437/9358/0189/files/39977054869.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_off00004768.bin
013db49e3c8ddecf2e9766e0d2d672ca79b75b55ba8953c2b539c38dc5f4ea11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4768 5456 bytes
font_01_sfnt_off000059e6.bin
78e165b7c7269be8ac584476ae776c8a479240d2d0bb584fd27adde7fbe6a6a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E6 10436 bytes
font_02_sfnt_off00007cce.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCE 16164 bytes

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