Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc815754a36232c…

MALICIOUS

PDF

47.9 KB Created: 2020-08-14 02:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d34e72acf51b5ec211d685d4c196da6f SHA-1: 170566f19be93ca1472dc31dd6fe30f9689ce056 SHA-256: 3cc815754a36232c900b19331fbbfb041795853ae32def1383fd25777b919d83
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=android+phones+that+will+support+fortnite'. The document body, though partially corrupted, also contains this URL and references to 'Android phones that will support fortnite', suggesting a lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=android+phones+that+will+support+fortnite
    • http://files.theandersonoutlook.com/uploads/1/3/0/7/130739180/79005.pdf
    • http://files.janecaldwell.com/uploads/1/3/0/7/130739809/lolokenif.pdf
    • http://files.villaabadi.com/uploads/1/3/1/8/131871424/delirufo_gefezunokukukux_kasax.pdf
    • http://mefaz.bearsheadminis.com/uploads/1/3/0/8/130813765/d3a7a5bf963e4.pdf
    • http://jobitis.skylinebitandspur.com/uploads/1/3/1/4/131483025/nojivedaxuwi.pdf
    • http://files.villaabadi
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/94973480350.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/47612694222.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/koteros.pdf
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/dekazenazutibaserejuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9102/5306/files/jeduvudosawagukul.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/35362843850.pdf
    • https://cdn.shopify.com/s/files/1/0440/7413/9813/files/jameson_capitalismo_tardio.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/sabudigobejedejemivukufeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/1685202715.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/31724632330.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/rolubavugo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/welugawofalabewuwi.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_off00007bc3.bin
18ccb2ee61c46f3939541e35c74eae600ce1dfe74c3d724a4de441d06b978897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC3 5208 bytes
font_01_sfnt_off00008d81.bin
c607527c083cbf71000ba2af8bd8f5abf7ec1e31ba6a6460e272c526c0a633d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D81 10652 bytes

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