Malicious PDF — malware analysis report

Static analysis result for SHA-256 d514af95a997cbea…

MALICIOUS

PDF

44.4 KB Created: 2020-07-11 22:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05249e7a4404d309ee5a57b80b221361 SHA-1: 29e0a4c3d4fa79ae0210a76ef3fbc17af2f2c337 SHA-256: d514af95a997cbea18a8cea858854747c88eda6c4f760f22e587e170822a9a8e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirectors or link farms designed to obscure the final destination. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=prisma%202017%20ltz%201.4%20manual'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=prisma%202017%20ltz%201.4%20manual
    • http://files.riptidebaseball.org/uploads/1/3/1/1/131163976/9012855.pdf
    • http://files.barndoorllc.com/uploads/1/3/2/3/132302924/73f4fd7b4ee401.pdf
    • http://files.neonopen.com/uploads/1/3/2/8/132814123/bda8aca.pdf
    • http://files.thealbertafloodroseproject.com/uploads/1/3/0/9/130969555/13cd00738d.pdf
    • http://files.kingdomchurchtx.org/uploads/1/3/0/9/130969498/lubididuxilidu.pdf
    • http://files.innovationneighborhoodphl.com/uploads/1/3/1/0/131070389/9e0b40.pdf
    • http://files.demornewarrenddub.com/uploads/1/3/1/4/131409170/dakodup-simegi.pdf
    • http://files.strongerdaybyday.com/uploads/1/3/1/6/131606335/tudawow.pdf
    • http://files.deercreekproducts.net/uploads/1/3/2/6/132695329/lawedivorenaxutelu.pdf
    • https://danutajozuk.files.wordpress.com/2020/07/kenetosumudawinapa.pdf
    • https://sulekes.files.wordpress.com/2020/06/ratokabebakesane.pdf
    • https://nopelagozure.files.wordpress.com/2020/07/gegimurajepisujuwadorawej.pdf
    • https://kozoribudos.files.wordpress.com/2020/06/74884434261.pdf
    • https://roropebuj.files.wordpress.com/2020/06/95062866168.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/pomupevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/92864807605.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopafomapezujiwowab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0428/5943/0054/files/73092327595.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peposorutap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8357326041.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.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_off00006d7c.bin
c9700fc7849c1e9bf023c8dcee8d79d93552c7cfb9b2abe8b05cd4acbdbf403c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7C 5060 bytes
font_01_sfnt_off00007e99.bin
09d980cfd75ee6fe1f712ac1655fc3025118f6687e78c6182f8d30ca41742c0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E99 11152 bytes