Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76d99300a1202f6…

MALICIOUS

PDF

66.1 KB Created: 2020-08-03 22:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 846ec46b1c5dae763cb464e56bb7e1ac SHA-1: 89ed50af555d1ddba09cc597f2a7fc7496a4b247 SHA-256: c76d99300a1202f6325e0d970ec95b4612197e29f46b5a9d27402efb46c0fbd0
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious domain (ttraff.ru). The document body, though heavily obfuscated, contains the URL that is also present in the critical heuristic firing. This suggests a phishing or redirection attack designed to lead the user to malicious infrastructure.

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=lightning+arrester+for+building+pdf
    • http://files.yinstillyoga.com/uploads/1/3/0/9/130968942/257b0acbb3f86a.pdf
    • http://files.sinergysports.com/uploads/1/3/1/4/131438308/daloxotuxedomamomi.pdf
    • http://files.theyellowdoorstudio.com/uploads/1/3/1/1/131163599/0a018c95cf2320c.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/fupanonemuwuwez.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/kowesufarubedef.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6918/files/xewirokopag.pdf
    • https://cdn.shopify.com/s/files/1/0434/1959/9004/files/pelofir.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/36640915867.pdf
    • https://cdn.shopify.com/s/files/1/0435/4041/4615/files/1572483740.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5979/files/33403421980.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4742/files/54106634294.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/83048952495.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/maya_extrude_along_curve.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0309/files/tujisotuziwunaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8584/6933/files/99369697619.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_off0000c163.bin
0ec681c3591012878567e3379eccbc1422168c8792897ee1255ec0b89b3a5d76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC163 5384 bytes
font_01_sfnt_off0000d3ad.bin
86996e92ec0490744606c09de59f1081e343214ebfa3d7449660e2f0aacf0fcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AD 12008 bytes

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