Malicious PDF — malware analysis report

Static analysis result for SHA-256 389523ba34b2fc3e…

MALICIOUS

PDF

34.8 KB Created: 2020-09-20 23:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02ba08fc37dae7a632f2065be8cf6a24 SHA-1: aaff5e033abeb17181ea018ca7554911c944903d SHA-256: 389523ba34b2fc3ef8b0eb66d0e422ed6d05121e952a6bda85220175e37500ca
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that leads to a link farm of other PDFs, indicating a phishing or social engineering attempt. The ML classifier also strongly flagged this PDF as malicious. The primary lure appears to be 'Solicit letter for death', which is highly suspicious.

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.club/wix?keyword=solicit+letter+for+death
    • http://files.jademusicschool.co.uk/uploads/1/3/2/6/132681443/vumix_xofaxinavir_bolapoga_gesule.pdf
    • http://dowel.jimenezhhc.com/uploads/1/3/2/7/132710703/zenipasuwi.pdf
    • http://files.emmakayonline.com/uploads/1/3/1/1/131163563/vafegegirosolema.pdf
    • http://files.therevenuebasket.com/uploads/1/3/1/4/131455543/radakeraxetugizan.pdf
    • http://dutiva.holisticcoachsg.com/uploads/1/3/1/6/131606218/3814806.pdf
    • http://files.maigretfamilyfarm.com/uploads/1/3/1/3/131397960/fadasuwenifujutu.pdf
    • http://files.owenashton.com/uploads/1/3/1/6/131637635/9737379.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/dulodiguvekizugabimeva.pdf
    • https://cdn.shopify.com/s/files/1/0435/5663/4785/files/69045197599.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/evernote_meeting_note_templates.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/tipasepo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6735/9900/files/51828132912.pdf
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/kosuwiwuzodidujo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1987/8048/files/isabelle_movie_2019_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0482/0513/6024/files/doguwi.pdf
    • https://cdn.shopify.com/s/files/1/0444/4153/4631/files/malvino_electronic_principles.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_off00004c5d.bin
177f380a889f22ccf2e927aac2748957e1bbdb8fd1bb05d7ff46743401a0f2a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C5D 5032 bytes
font_01_sfnt_off00005d6f.bin
208450e5078184868e16fc01bb82d460a78d78e8f786eb41ba962cd1acf46f59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6F 9688 bytes

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