Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a3d313ea87fbe8…

MALICIOUS

PDF

44.5 KB Created: 2020-08-10 10:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69652554565128bf03bb05b5182f8e9c SHA-1: 31702aaa8e9a403f8dddb063f75feacdbe28e0ab SHA-256: 26a3d313ea87fbe8605808c8d645b71868b5c763ff4a2498829ab9624d428860
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, including one identified as a malicious redirector. The presence of a 'download button' heuristic and the document body containing a URL further suggest a social engineering attempt to trick the user into navigating to a malicious site. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=learning+outcomes+module+in+tamil+pdf
    • http://files.osspto.org/uploads/1/3/2/6/132695451/milivokagadafokem.pdf
    • http://files.malamathesea.com/uploads/1/3/0/7/130739593/lezupera.pdf
    • http://files.collectorsartists.com/uploads/1/3/0/9/130969791/1be0a58005ce.pdf
    • https://cdn.shopify.com/s/files/1/0431/6125/6096/files/najemekiza.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/kinupovubejosopevala.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/18905117171.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/curso_de_introduccion_a_la_economia_politica_paul_singer.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/9564877477.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0695/files/37084960476.pdf
    • https://cdn.shopify.com/s/files/1/0434/6059/1776/files/25834852508.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/sezevutalopid.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1935/files/jenojadagefotodi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4146/2174/files/speak_english_business_like_an_american.pdf
    • https://cdn.shopify.com/s/files/1/0430/1435/7145/files/betrayal_at_house_on_the_hill_rulebook.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/21509683409.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94260126358.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/34660991441.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_off00006185.bin
b948ff63dc2e296a3ce72a01bc03ba66cde1e3405ca69b8ff5e708e6f5cb240c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6185 5416 bytes
font_01_sfnt_off000073de.bin
f00898794647d1acd4785cb0c49c744b8a9237c3f5e3c222415a02ab61c216e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x73DE 4048 bytes
font_02_sfnt_off000081e5.bin
9ca9987b05a04a31db43339daee88bbde3e92e05e20231b92086e569b851c6c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x81E5 10228 bytes