Malicious PDF — malware analysis report

Static analysis result for SHA-256 36531afdeadb0f07…

MALICIOUS

PDF

40.1 KB Created: 2020-08-24 02:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06f33c229b78f39adbab59e054bb56b4 SHA-1: 699ece94d54bad7a7d9a71c34d2c81a6b8ed599c SHA-256: 36531afdeadb0f073c7795c4087a0cd8d2c64a4757bee50eae115bfbad94c8af
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=tropical+fruits+fight+list+answers', which is identified as a malicious redirector. The presence of numerous embedded links, many pointing to external PDFs, strongly suggests an attempt to lure users to malicious sites.

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=tropical+fruits+fight+list+answers
    • http://sawirax.logosphere.us/uploads/1/3/1/4/131406082/839f7a.pdf
    • http://veminir.sallykinsey.com/uploads/1/3/1/1/131163667/buxenatiwugu.pdf
    • http://files.jessicatchang.com/uploads/1/3/0/7/130740138/dowofanuxobixow_dorawegodewoma.pdf
    • http://files.mkgeducation.com/uploads/1/3/1/4/131437615/mepeludefisunu-pusovusavokeji-mowawovudoxeso-subepijup.pdf
    • http://files.jessicamaryrobinson.com/uploads/1/3/0/7/130738741/jekur_kikiva_nobema_pasetefuvola.pdf
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/57387173049.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0709/files/1556839917.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/print_webpage_to_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/leed_green_associate_candidate_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/0671/4268/files/bakoketuxapaxuzididagolem.pdf
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/43696168291.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/74522204614.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/coordinate_geometry_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6904/files/cardinality_of_sets.pdf
    • https://cdn.shopify.com/s/files/1/0438/2828/1506/files/basel_1_2_3_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/21179333725.pdf
    • https://cdn.shopify.com/s/files/1/0434/7792/6040/files/iko_needle_roller_bearing_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/30500497997.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_off00005f54.bin
902ef97b026776d245a3e94cfa3ac074bdd53911f52f5aa837ff2a2420ad0c48
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F54 5320 bytes
font_01_sfnt_off0000716d.bin
c237170241a349b20337521fa27f8d6dc12900dfec41a5211b07d1eccf013f3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x716D 9896 bytes