Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23e2f95e95050c4…

MALICIOUS

PDF

50.6 KB Created: 2020-09-03 19:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 918a42c48eaf4423030e418b8c629c6c SHA-1: 0376adc873858f45549c38b99582b6bce963204a SHA-256: e23e2f95e95050c41e6cee938a6638d96b0225fa76c97f7698d4e35a65fee47c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to 'A p r o m full form' and references to wkhtmltopdf, suggesting a lure to a potentially malicious site. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=a+p+r+o+m+full+form
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/adobe_indesign_cs6_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/rokasowomerixav.pdf
    • https://cdn.shopify.com/s/files/1/0439/9605/3662/files/97460540430.pdf
    • https://cdn.shopify.com/s/files/1/0435/6122/2307/files/48946771173.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/tototibuwatav.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8188/files/vemisilugurapasejuk.pdf
    • https://cdn.shopify.com/s/files/1/0457/4127/7340/files/ithenticate_free_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/biohazard_5_game_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/pepebuluza.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1006/files/19991430288.pdf
    • https://cdn.shopify.com/s/files/1/0430/6151/0293/files/types_of_business_report_writing.pdf
    • https://static.usrfiles.com/ugd/d9e9a0_32c6ee563d8443d382763aae6d3ea970.pdf
    • https://static.usrfiles.com/ugd/9d66c7_6eafef029c78423299defca28d08a23d.pdf
    • https://static.usrfiles.com/ugd/e23fbb_51f8d4ce76e34d01957cd23ad8e18dbe.pdf
    • https://static.usrfiles.com/ugd/b7306e_ef10d6a49a1749319b8ed67cbf32e4e8.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_off000068ac.bin
f1b25138cf5c4b85e0b43e1dd8d816b041dc945b5ad845cb2b2f5d22802dff7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68AC 4648 bytes
font_01_sfnt_off0000785c.bin
d4b94b5954a5e03be7b31a3e1f503ba11eca34c79c839e2a5284f70c37b2b7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785C 10472 bytes
font_02_sfnt_off0000956a.bin
25cf26810e496046076e43130c98f462dca39c11e6b3787081fc14246d4f957b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x956A 11844 bytes

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