Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6394c5633e344d…

MALICIOUS

PDF

48.2 KB Created: 2020-08-10 11:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b78bf044f885ee38004a06a9fd2ec699 SHA-1: 06eca713a6981529c9833f7790a271e4a61934ff SHA-256: 3a6394c5633e344d3e83f84e31e9cc4433922256ffd2b07e695268c9fe960829
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the text 'Ielts speaking part 3 questions with answers pdf' and the malicious URL, suggesting a lure to trick users into clicking. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK directly identifies the malicious redirector infrastructure.

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.cc/pify?keyword=ielts+speaking+part+3+questions+with+answers+pdf
    • http://files.bustihistoricalsociety.com/uploads/1/3/1/6/131606727/fdd63.pdf
    • http://files.wepintheglobe.com/uploads/1/3/1/1/131163540/papijigiron.pdf
    • http://files.chathletics.org/uploads/1/3/1/8/131856173/wozut.pdf
    • http://files.mydetecting.com/uploads/1/3/1/6/131607169/xunefoze-jobifizer-pijuk.pdf
    • http://files.themxersfactory.com/uploads/1/3/1/3/131398109/naxoranixeri-runupojam-vigiwivaxeputal-rabuwusimiwuvod.pdf
    • https://cdn.shopify.com/s/files/1/0434/3352/5400/files/numafajogevoregivosofevot.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/goxaledegoke.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4748/files/sejoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6001/files/wonidajerovewerewiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/sue_bryce_posing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/zunorozisodozazox.pdf
    • https://cdn.shopify.com/s/files/1/0430/3241/2311/files/50153690250.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/tifonapefisumubesafoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/viwinirarixokulenawofiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/guia_completa_de_calistenia_y_street_workout.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/10107208194.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/jingle_bell_rock_chords.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_off000067d3.bin
40f280332206dcccbaafc564ce8c6ea525f911ff946a0a111dece97f304ffe13
pdf-font-stream PDF embedded font (sfnt) at offset 0x67D3 5684 bytes
font_01_sfnt_off00007b38.bin
29db0e16857ec360b83080471f94e3e35328f99e25c7ea442b1af588244e8687
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B38 10284 bytes
font_02_sfnt_off00009ea8.bin
5d72d630640305d452d914085fd6c65e0d8125198bed8028c282d44fd0327be8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA8 16068 bytes