Malicious PDF — malware analysis report

Static analysis result for SHA-256 b880682efbe88279…

MALICIOUS

PDF

44.2 KB Created: 2020-08-22 02:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a943c4bf5e30e213a46845b9f0f52c4e SHA-1: 6cf2721f159daee393181932ab60bd76c7495da1 SHA-256: b880682efbe88279884b83d0349c667a191a6e9a2e30192e43bd6b69f1af809b
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though partially corrupted, contains text related to 'brain games' and includes the malicious URL. The primary attack vector appears to be directing users to malicious infrastructure via a link farm.

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=brain+games+for+computer+free
    • http://files.omanflorafauna.com/uploads/1/3/0/7/130740490/6396558.pdf
    • http://files.raftracottageholidays.com/uploads/1/3/1/4/131406473/zekudeso_jejiw_juruk.pdf
    • http://kibulu.missbilovsky.com/uploads/1/3/1/4/131408024/1667618.pdf
    • http://files.pholanasianbistro.com/uploads/1/3/2/6/132682684/2351157.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/aprender_a_dibujar_rostros_realistas.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/36510333838.pdf
    • https://cdn.shopify.com/s/files/1/0438/8788/6488/files/kanedididazavidolidape.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/38969340942.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/53115246803.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/lyon_france_tourist_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/git_pull_recursive.pdf
    • https://cdn.shopify.com/s/files/1/0437/5432/4117/files/37533093797.pdf
    • https://cdn.shopify.com/s/files/1/0452/0011/3813/files/wiburom.pdf
    • https://cdn.shopify.com/s/files/1/0435/0243/6518/files/fesojego.pdf
    • https://cdn.shopify.com/s/files/1/0440/6899/5237/files/sebatajinerulinosoxad.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/55464641865.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_off00006ea1.bin
71684feb80444798ab82e7becfba5b6e75f11736f0e8c59e6794bb285cbf3353		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA1 5352 bytes
font_01_sfnt_off000080c1.bin
f70ebdc51f13cfbcbf132a81a92e393c73d8b81d1df994befac472f55bc8ce95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C1 10412 bytes

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