Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b62c4ce4cc53822…

MALICIOUS

PDF

42.2 KB Created: 2020-08-02 20:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: feb3a23aa7d4f14cde7a8d12fba0c4e2 SHA-1: b3fabcdb5b92a2a496eb593ca5b85c5ba74e8706 SHA-256: 0b62c4ce4cc5382272699cac6ceb82a2f54dacdfb4e7c12583b03105a3249861
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=santa+rampage+free'. Additionally, it features a large number of external PDF links, suggesting a link farm or redirection tactic. The presence of a 'download button' lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=santa+rampage+free
    • http://files.khang-le.com/uploads/1/3/1/6/131606035/6361321.pdf
    • http://files.sarahkilchgaffney.com/uploads/1/3/2/6/132696104/kupufupovizabetizoz.pdf
    • http://files.ourotherskeeper.org/uploads/1/3/2/6/132680860/62060.pdf
    • http://files.warrensprinting.com/uploads/1/3/0/8/130814754/gebunupuduwibegera.pdf
    • http://files.artandroulla.com/uploads/1/3/1/3/131380773/6e51b943ebb202b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1778/8830/files/92668154525.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/makanojunijotajogaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/varimadosikujibipuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/doxonemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5602/files/8206037039.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/13491826387.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/4207389826.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/42953495733.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/potuxus.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/zigir.pdf
    • https://cdn.shopify.com/s/files/1/0440/6021/3398/files/relipupivupekujajoguvez.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/21486957915.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/ato_mix_virtual_dj.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db4.bin
16f4897019ea15b06cb993bdda456e5482f29e8962658af6e0f6b13a667011bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB4 5116 bytes
font_01_sfnt_off00006f09.bin
3b1a2d71f14ce8dd3a2756a087aa120b2da68c6805c87c59098203a7dc38995b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F09 14544 bytes

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