Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66caeff85aa1de5…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 09:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b32d80ad0c4cf55870b6bff3b441f31b SHA-1: 5c845fb3ae4a72002677e61fcf55cab18424efc9 SHA-256: a66caeff85aa1de50edb1c268dc54ad19aa45023bdc3ea020643f0ed2c4439e7
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a template for an editable venn diagram. The document body and embedded URLs suggest a lure to a malicious site. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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.com/pify?keyword=editable+venn+diagram+template
    • http://xoxatul.americanearthsupply.com/uploads/1/3/0/8/130814328/e514a17874d01.pdf
    • http://files.ninawriter.com/uploads/1/3/1/4/131454012/lawemarolale.pdf
    • https://cdn.shopify.com/s/files/1/0440/9743/7848/files/5326411394.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2466/files/bcd_addition_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/7873/0403/files/safety_data_sheet_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9232/files/46830122867.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/mitosis_and_meiosis_worksheet_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2394/files/wexab.pdf
    • https://cdn.shopify.com/s/files/1/0435/0548/3942/files/1757894809.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/bst_c_github.pdf
    • https://cdn.shopify.com/s/files/1/0449/5346/9083/files/civil_war_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/backpack_camping_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0440/5723/1525/files/82696985310.pdf
    • https://cdn.shopify.com/s/files/1/0448/0414/5309/files/misery_penguin_readers_level_6.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/devuzobe.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_off000063c5.bin
e9780c7d46b1bac5cc619e0ad6e30d91b7577024ab470de122a3984069974ce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C5 5256 bytes
font_01_sfnt_off00007597.bin
84b09a7c814fb0a9f59a64326bb8c38aa3b5f24ecdad0e2a6c8be30e9ee6a8c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7597 10040 bytes

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