Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd57634e14379550…

MALICIOUS

PDF

43.1 KB Created: 2020-08-15 03:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 005e0e1609cf806daa0eb407f0374805 SHA-1: 6f51a540ad0808d651276bd4054f4e7303ef95ca SHA-256: cd57634e143795502ec09fc2bf3784533c2e1c0150c0de88bd39c3636863dca9
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=dance+class+attendance+template'. This URL is presented within the document body, disguised as a dance class attendance template. The PDF also contains a link farm heuristic, indicating a large number of external links, many of which point to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a deceptive document title and a malicious link.

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.com/pify?keyword=dance+class+attendance+template
    • http://files.attitudeofservice.net/uploads/1/3/0/7/130739039/pijobideluzosi_nusudivegibor.pdf
    • http://files.relst-uhag66.com/uploads/1/3/1/4/131406849/9287563.pdf
    • http://files.finequalityrugs.com/uploads/1/3/1/3/131384777/mivovedagan_kezag.pdf
    • http://files.janetan.net/uploads/1/3/1/4/131406288/xosakelarusopeg.pdf
    • http://tilugobit.gloriousbibleinternational.com/uploads/1/3/0/7/130775680/kuturesufidodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9204/1118/files/74731736592.pdf
    • https://cdn.shopify.com/s/files/1/0434/1976/2855/files/nezowijajezedulilogux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/26582957456.pdf
    • https://cdn.shopify.com/s/files/1/0434/6744/0290/files/26342180674.pdf
    • https://cdn.shopify.com/s/files/1/0439/3458/0891/files/39278518939.pdf
    • https://cdn.shopify.com/s/files/1/0448/0784/8096/files/5th_grade_common_core_math_word_problems.pdf
    • https://cdn.shopify.com/s/files/1/0437/9036/8929/files/supazolototivesul.pdf
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/54254667435.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4297/files/kopizarikibuxuzusiba.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_off0000602f.bin
96a3a984480f225ff5892c7b38dd5cfa7fb7329270ded7788833a536c93dbbf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x602F 4752 bytes
font_01_sfnt_off0000703b.bin
1abf6a58f766792eacadef66f8a48dc435ec92dd5626d4426b22999e9e813d53
pdf-font-stream PDF embedded font (sfnt) at offset 0x703B 9880 bytes
font_02_sfnt_off000091e3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x91E3 4324 bytes