Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb3c74eed73e5df…

MALICIOUS

PDF

58.1 KB Created: 2020-08-21 19:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 676a6396f8244e074f05e4fc8678124d SHA-1: fecb6d8aaa5d685717ca0d4d5d88df9a1a7860e3 SHA-256: 3fb3c74eed73e5df7d49f88435dc0828207d0e078d4865635e6f529c565c8ae9
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it's a malicious redirector, linking to a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains the same URL as the redirector. This suggests the primary purpose is to lure the user to a malicious site via the embedded link.

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=anatomy+lower+limb+mcqs+pdf
    • http://gisimo.gethealthyinitiative.org/uploads/1/3/1/4/131437736/8bdee07ead1.pdf
    • http://wakizetep.dncministries.com/uploads/1/3/1/8/131856543/002887d792.pdf
    • http://buzaruwe.jacktaylorphillips.com/uploads/1/3/1/8/131858661/vogitofipeveno-rujiwaledove.pdf
    • http://files.winnebagocountyrta.org/uploads/1/3/1/8/131856725/bc43284fc.pdf
    • http://files.sarahgadd.com/uploads/1/3/0/7/130775830/susipamu_lunuxara_kuwiwibawu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3648/2458/files/lokagevefukudo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/31376960247.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/waxexeruwiko.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/69202853012.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/nato_phonetic_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/10876287040.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/chemistry_form_5_chapter_2_notes.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/fevegawo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/present_perfect_continuous_tense_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/xekewiguromotoboxisaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/kerowufatu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7744/9366/files/13255766425.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/tovexu.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_off0000a5a5.bin
79663c49f8d3a738be331ef73e2d289fa18798dbfff8f3e6ed304670305b02be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A5 5748 bytes
font_01_sfnt_off0000b922.bin
ddcd5634fe9b4d7cde035ecf8416e723452597cfd01c9ee286d7663beacaffd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB922 9972 bytes

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