Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05265cc3494a58d…

MALICIOUS

PDF

61.3 KB Created: 2020-07-29 13:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 413bf6ed94ce043c0e9ec4b5621686ac SHA-1: d0837b1b03def2e239fc6d4724911179f2276235 SHA-256: b05265cc3494a58df786dd13bef0d968b4b43b653412badfb0bf939c7ddeb84b
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to reference 'Broaching tool design pdf', suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector 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.com/pify?keyword=broaching+tool+design+pdf
    • http://files.jsjrnashville.org/uploads/1/3/0/9/130968962/27420abc445c.pdf
    • http://files.kcactf5.org/uploads/1/3/1/4/131437941/0c2f89a7b246f.pdf
    • http://files.seanrashbowling.com/uploads/1/3/0/7/130740589/5f87b35d.pdf
    • http://files.kcactf5.org
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/navefixunip.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/ruworezizitep.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1592/files/ropag.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/79181861586.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30611133668.pdf
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/50121141356.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/fadokojunubixaxegojusopev.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/bukokodatesidofonebelowuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0438/files/jigotawuxikavuta.pdf
    • https://cdn.shopify.com/s/files/1/0437/0310/7752/files/74821790277.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75815848510.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/86034724782.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_off000098d7.bin
6e632630efdf5290d88981605eabf7cb85ef0abf09896709e261aae223b517bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98D7 5256 bytes
font_01_sfnt_off0000aaa6.bin
a5dc19e66e68a1e62470da3ceebbc76da2ba08749e33cdfb0bb931283a78139b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA6 12144 bytes
font_02_sfnt_off0000d22d.bin
13596defb2bcc6fc1048af8e1a4b019015f57a35384aba88f9e1637b8f94b635		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD22D 16168 bytes

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