Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f110e93bd9295ee…

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 14:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be71a9fa5ab276f66953580366954570 SHA-1: 2585ae19510ea063a5a32c3def2bb065c426ef26 SHA-256: 8f110e93bd9295ee26a12ca2ed7b935bc2ea271a5e348f9215cf61e52d276be2
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL identified. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, indicating an attempt to direct users to harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=modified+barthel+index+shah+version+pdf
    • http://zosujil.anchoragefirstcovenant.com/uploads/1/3/0/9/130969060/mujuni-dijufirijakuw-gipimokedob-xuxojuzusiweb.pdf
    • http://files.tedxyouthlucenacity.com/uploads/1/3/1/4/131482819/purugemen.pdf
    • http://files.creativeappnologies.com/uploads/1/3/1/6/131637163/nujomadetavedizepud.pdf
    • http://files.mytridentestates.com/uploads/1/3/2/7/132712206/8239059.pdf
    • https://cdn.shopify.com/s/files/1/0432/7840/1700/files/marvin_harris_cannibals_and_kings.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/68479402160.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/43438849309.pdf
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/fudaganomonisekesuxasun.pdf
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/71404668365.pdf
    • https://cdn.shopify.com/s/files/1/0434/1989/3927/files/brew_install_maven.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/30501463770.pdf
    • https://cdn.shopify.com/s/files/1/0429/7824/6815/files/sidofetamo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/fogebepujevizori.pdf
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/68702135754.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9140/2660/files/tobukepemizumomut.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7415/files/83222255629.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_off00006ee6.bin
71b11ccc4fc780b1942d90df5164cb28d2350046c3b87b6147ae0add7400fe05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE6 5400 bytes
font_01_sfnt_off00008153.bin
be475b2f1566a24b761365ed3db37d276d3278627ae1a91b0a5abdf4c5f35cdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8153 10260 bytes

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