Malicious PDF — malware analysis report

Static analysis result for SHA-256 af24f6cbd3d164f4…

MALICIOUS

PDF

35.9 KB Created: 2020-07-10 10:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad00917d3e586e6f2d128ae53fa36d7c SHA-1: 6146b1895d66e290715b9aea64f9a7aef815d3b3 SHA-256: af24f6cbd3d164f4e976e0bc5413907da936fb29dd435c4448d02fd41b19269e
150 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to SEO-optimized PDF hosting sites. One critical heuristic identified a link to a known malicious redirector, `https://ttraff.cc/wb?keyword=nella%20fantasia%20partitura%20pdf%20gratis`. The document body, though partially corrupted, also contains this URL and other PDF links, suggesting a coordinated effort to drive traffic to malicious infrastructure. 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.cc/wb?keyword=nella%20fantasia%20partitura%20pdf%20gratis
    • http://files.summeroffootball.com/uploads/1/3/0/7/130775633/8543288.pdf
    • http://files.marianasterrestrialconservation.org/uploads/1/3/0/7/130775751/pazugasovuk.pdf
    • http://files.barkmanwoodworking.com/uploads/1/3/1/4/131437531/7020795.pdf
    • http://files.decatn.org/uploads/1/3/0/7/130739095/morizewi.pdf
    • http://files.krwoodworkings.com/uploads/1/3/1/8/131871894/1591208.pdf
    • http://files.orangehistory.org/uploads/1/3/1/3/131380998/6a7d3c8e67aa6.pdf
    • http://files.graffitiwgratitude.com/uploads/1/3/0/7/130738814/808e7b1556b9ad.pdf
    • http://files.wichitafallsbridge.com/uploads/1/3/1/6/131606429/1806263.pdf
    • http://files.charlottesabourin.com/uploads/1/3/2/6/132681213/lufivosoxopov.pdf
    • https://ribodijexob.files.wordpress.com/2020/06/56752665884.pdf
    • https://tisamipaf.files.wordpress.com/2020/06/mosavexu.pdf
    • https://vomibomuso593992328.files.wordpress.com/2020/06/99438907350.pdf
    • https://junakunujira.files.wordpress.com/2020/07/40991982264.pdf
    • https://junoturadaf.files.wordpress.com/2020/07/vizabolujononipabages.pdf
    • https://kesakede.files.wordpress.com/2020/06/retenoxopejifiziwa.pdf
    • https://bavorekivaso.files.wordpress.com/2020/06/gomekolusazerewep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zokiwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81274949660.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44994208471.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mesujegixaxufusataxa.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_off000048ff.bin
4446a7b2b4b53b3f7b33a0448211239cc625ce8583affff96eeab6c3738e3b58
pdf-font-stream PDF embedded font (sfnt) at offset 0x48FF 4952 bytes
font_01_sfnt_off000059e1.bin
f3b436b6f363a0f04ce466e4234ab052514959b38c4343bf4d016be2887afead
pdf-font-stream PDF embedded font (sfnt) at offset 0x59E1 11972 bytes