Malicious PDF — malware analysis report

Static analysis result for SHA-256 e381a047f5c1c592…

MALICIOUS

PDF

42.2 KB Created: 2020-06-30 03:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0638ff09f32c015a66e294c228cb89ec SHA-1: fc0242e221fa1f21d5d0bd75659609ddbf73334b SHA-256: e381a047f5c1c592575dec2090bbf119878f1bd8a4fd8bbc12922d04741219a8
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous embedded URLs pointing to external PDF documents. One URL, 'https://ttraff.ru/wp3?keyword=annamalai+mp4+video+songs+free#annamalai+mp4+video+songs+free', is identified as a known malicious redirector. The presence of many such links suggests an attempt to manipulate search engine results or lure users to malicious content.

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/wp3?keyword=annamalai+mp4+video+songs+free#annamalai+mp4+video+songs+free
    • http://ohsnappicture.net/uploads/1/3/0/2/130287973/8372460.pdf
    • http://files.johanneslavertonrestaurant.com/uploads/1/3/0/6/130604563/geveg.pdf
    • http://perceptivecharm.com/uploads/1/3/1/1/131163828/venekogufek.pdf
    • http://files.mrstruitt.net/uploads/1/3/0/2/130270938/2e870414725216f.pdf
    • http://yajunshi.com/uploads/1/3/2/3/132302892/b2a558d.pdf
    • http://lexmorshipping.com/uploads/1/3/0/5/130590355/xopakonan.pdf
    • http://mta-sts.jansma.com/uploads/1/3/0/7/130776267/puxirav.pdf
    • http://wesnicholson.com/uploads/1/3/0/2/130270987/4099145.pdf
    • http://delwebbatcanebay.com/uploads/1/3/0/9/130969404/juput_ripaduz_vokarumidezoki.pdf
    • http://dwrina.com/uploads/1/3/0/6/130621484/dizemomevoxavitona.pdf
    • http://files.boondocksports.com/uploads/1/3/0/7/130738621/vufeleziri.pdf
    • https://figanupa.files.wordpress.com/2020/06/jaritemaniwiwopo.pdf
    • https://fuzejumif.files.wordpress.com/2020/06/30393698048.pdf
    • https://kejivugufe.files.wordpress.com/2020/06/98255980176.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_off000065bb.bin
6250bd8c578ac929a2511593a9194530182e0c33fb4609d52ebc8dd9046d98f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BB 5208 bytes
font_01_sfnt_off00007756.bin
cffaefbcc60d715684de78e39b7e771eb73d7e33262ff2e9867126dbfb041aa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7756 10776 bytes

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