Malicious PDF — malware analysis report

Static analysis result for SHA-256 312acdfc4a7e9d44…

MALICIOUS

PDF

39.1 KB Created: 2020-08-09 03:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c679071b33f08c3203955194e61763f SHA-1: b5d5644e25f25832a5cc73d62cad654fad4b5d4a SHA-256: 312acdfc4a7e9d447045796e6558210ac61b3e41aeee1cf8603ae281e90807ad
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.ru/pify?keyword=spinal+stenosis+exercises+pdf. This indicates a social engineering tactic to lure victims through a seemingly relevant topic. 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/pify?keyword=spinal+stenosis+exercises+pdf
    • http://files.dreamcatchermeadow.com/uploads/1/3/1/4/131406781/rinudovesa-zetija-zenuxoselipafuj.pdf
    • http://files.breathewithlauren.com/uploads/1/3/1/4/131437351/424db3.pdf
    • http://files.devizessportsclub.org.uk/uploads/1/3/2/7/132712011/rufifivojope.pdf
    • http://files.cheqbayrenewables.org/uploads/1/3/0/8/130874339/voxodazomolevos.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7873/files/lapereramiwewefon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tomazemajetel.pdf
    • https://cdn.shopify.com/s/files/1/0436/8406/9526/files/jurnal_angina_ludwig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/gijoros.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2198/files/wawotojusoradigenafiwixi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/segipidegusuvirekiva.pdf
    • https://cdn.shopify.com/s/files/1/0435/6312/2843/files/fundamentals_of_fluid_mechanics_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/4991257550.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/western_reserve_life_insurance.pdf
    • https://cdn.shopify.com/s/files/1/0433/3128/9256/files/81907404778.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/tagekijenugulevadaz.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_off00004f5a.bin
6f2d412dc79b4ceb04bd4b09af1e7d81b4044bfa1246a5c571b393c54f584ffb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5A 5108 bytes
font_01_sfnt_off000060b5.bin
762f46187f08f4c26749a1ca10ec455f81065e1e2e5a87aff2107c13e94b574e
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B5 9552 bytes
font_02_sfnt_off00008159.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x8159 4324 bytes