Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d5a3a5ed86ac79e…

MALICIOUS

PDF

44.6 KB Created: 2020-08-09 23:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e9c1878ade0d1fc5e51fb6bef9032fd SHA-1: ec752a95a6793fa705f0da107e3929c8c4e0f003 SHA-256: 3d5a3a5ed86ac79e4f8fcb655521bb72d4f2b964de5ab05e45f371af4bcb3ad9
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, which is a common lure for phishing or malware delivery. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=asthma+action+plan+for+school+pdf' which is flagged as malicious. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to external resources, likely for SEO manipulation or to host further malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=asthma+action+plan+for+school+pdf
    • http://files.dbynbuildingcitizens.net/uploads/1/3/1/0/131070559/4633843.pdf
    • http://files.tcaps247.com/uploads/1/3/1/6/131606392/basawubemog.pdf
    • http://files.chargethelinedesign.com/uploads/1/3/0/9/130969481/jenajazikes-pabofodu-konelipu.pdf
    • http://files.dfirprofessional.com/uploads/1/3/1/6/131637896/2724c2a0da.pdf
    • https://cdn.shopify.com/s/files/1/0433/9849/6412/files/tosuvofol.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/49102733195.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7725/5836/files/retupudofomefefenamakikeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/xijanazopaxej.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/92161457704.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/apprendre_le_franais_vocabulaire.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/teoria_finalista_mitigada.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/65889714017.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/40368501550.pdf
    • https://cdn.shopify.com/s/files/1/0434/0809/7445/files/subupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1847/files/39868509934.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_off00006fdc.bin
d5d7945a79277cfd718ec6a06320a6cdde75fe3993f8595f375aba8ecf9dbf75
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDC 5384 bytes
font_01_sfnt_off00008201.bin
0a713a2c291939f8728a4f4790c4388c54777ae6138a218ec6c53b4ea3e70526
pdf-font-stream PDF embedded font (sfnt) at offset 0x8201 10652 bytes