Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea98e9542afcee9…

MALICIOUS

PDF

50.3 KB Created: 2020-07-08 22:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbe982d0c81f4874a2228851790ff5eb SHA-1: 368eb515ca1ba4ee5bad299e70cfc848e5708c88 SHA-256: 7ea98e9542afcee9336c1e1cfad6822f46963e5e694b90c5ed23b39c79a7b9a2
152 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, including a known malicious redirector. The document body explicitly mentions 'Nitro pdf professional 9 free download with crack 32 bit', indicating a lure for users seeking pirated software. The presence of a malicious redirector and a large number of SEO-optimized PDF links suggests an attempt to drive traffic to potentially harmful content or phishing sites.

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.cc/wb?keyword=nitro%20pdf%20professional%209%20free%20download%20with%20crack%2032%20bit
    • http://files.johnkarlstokes.com/uploads/1/3/2/7/132740525/5722894.pdf
    • http://files.itsunhoney.com/uploads/1/3/0/8/130813516/9171640.pdf
    • http://files.misfitcrusaders.com/uploads/1/3/0/8/130814672/634f8e.pdf
    • http://files.dogmamoncton.com/uploads/1/3/1/4/131437161/6728799.pdf
    • http://files.pca-music.com/uploads/1/3/1/8/131856518/ffb28f5.pdf
    • http://files.jeffallensportstalk.com/uploads/1/3/2/3/132302848/6020171.pdf
    • http://files.tynksgemstonedesigns.com/uploads/1/3/2/7/132740415/7381d2f1749d4.pdf
    • http://files.prosseracupuncture.com/uploads/1/3/1/4/131437531/ravilenu.pdf
    • https://kuwelejekez868790374.files.wordpress.com/2020/07/89647213290.pdf
    • https://sakadukil.files.wordpress.com/2020/06/739707281.pdf
    • https://texepavogex.files.wordpress.com/2020/07/50430290950.pdf
    • https://xepagobe.files.wordpress.com/2020/06/dekegiva.pdf
    • https://lovifame.files.wordpress.com/2020/07/daxitewakepe.pdf
    • https://mumiwarifiza.files.wordpress.com/2020/07/72542465429.pdf
    • https://karudike.files.wordpress.com/2020/07/jawamakelet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.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_off0000751c.bin
c655b71ba0c47525de13e7207b6e672ebbe3d53370e874fa13be01c2d3449387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751C 5748 bytes
font_01_sfnt_off000088a9.bin
c570539d5746218b1c536fc6236d5aee3245b93db4597da264ccb0327c0a4c61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A9 22280 bytes

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