Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e67d6f01e766b65…

MALICIOUS

PDF

44.9 KB Created: 2020-09-04 23:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 849521b7cc3e58dba3e03a65a0e058c8 SHA-1: d788a2250cf12540149ded46df2f33a7dae18f49 SHA-256: 1e67d6f01e766b65a6d874e439453a55ad66d5deb1de58babbf45df5b60d8685
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, disguised with a seemingly relevant keyword. The document body, though heavily obfuscated, contains the same redirect URL and a large number of links to PDF files hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted, but the primary malicious action appears to be the redirection to a malicious URL.

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.link/pify?keyword=schizophrenia+guidelines+2017
    • https://cdn.shopify.com/s/files/1/0435/3146/8951/files/nibasuwerutezipoxawirisuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/pewunupozetovesi.pdf
    • https://cdn.shopify.com/s/files/1/0445/5625/5396/files/concepts_in_thermal_physics_blundell_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/93845933389.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/16125991362.pdf
    • https://cdn.shopify.com/s/files/1/0463/3028/2145/files/1221340404.pdf
    • https://cdn.shopify.com/s/files/1/0440/0994/7301/files/2636655811.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/5995/files/togagorukazebowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9145/1303/files/12674471073.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1561/files/biliblanket_light_meter_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/zozoladejabeloruda.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/wubonapetakufaruzokinu.pdf
    • https://static.usrfiles.com/ugd/764aaa_6f368b951810481cb4f43fe217ebc79c.pdf
    • https://static.usrfiles.com/ugd/07ef24_f0bb1394baed474ebd10f332595a2b58.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_off00006a24.bin
3f2827381bea35e1970c724aff8b82a8791405eeb0227707b92f824d713ff341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A24 5896 bytes
font_01_sfnt_off00007e42.bin
ba4662ab655e058b80e04906a890ef2eea188637b85729e3df0299082d838b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E42 13012 bytes

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