Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ccaa2d8e01425e4…

MALICIOUS

PDF

42.8 KB Created: 2020-09-17 20:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eed861ba77ca8fc31c4e33a66abee760 SHA-1: 2f8e14009757bf0de8b477b2c9a2e411ad62ce9b SHA-256: 4ccaa2d8e01425e4abe45cd8a8c8dc2e890918e1645200e420a328e1a92a5929
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded links, including one pointing to a known malicious redirector at https://ttraff.link/wix?keyword=iboss+web+filtering. This suggests the document is designed to lure users to malicious sites. No scripts were extracted from this sample.

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.link/wix?keyword=iboss+web+filtering
    • http://files.foldedfeather.com/uploads/1/3/0/7/130738720/kafema.pdf
    • http://wibevire.gillilandhcwildrags.com/uploads/1/3/0/7/130775407/lipetu_mepinu_bebisifuzegivev.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/medipedimaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mofofuledezenededur.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/zerutezefivuvopupiwopaju.pdf
    • https://d475ff6f-7673-405a-8908-eedabba7a0b5.filesusr.com/ugd/3bcfef_013e68f9b8e54af999b0fa5b376130f4.pdf?index=true
    • https://88799f44-c2a2-484e-8db8-7cdff80ea9ef.filesusr.com/ugd/fc840b_cace9d4cf6cb4840886d2c35765f39de.pdf?index=true
    • https://48d66950-44b4-4450-a64d-9763f2c267cb.filesusr.com/ugd/b2ba6b_25f08559d31c49f780367f6bc9425659.pdf?index=true
    • https://91e2fdc9-7099-4d51-8553-3375d3972b8e.filesusr.com/ugd/e643da_e75bd56b731f4ed2a70c1bd468ffa3eb.pdf?index=true
    • https://103dab6c-4bee-4a53-a272-ccbaca81d07d.filesusr.com/ugd/70a38d_35df51c7902e4c32b42ceeeda6ebba97.pdf?index=true
    • https://0d0b0ca7-6f54-431f-aff3-f78dc2fb69b8.filesusr.com/ugd/dcc11b_e183284d869b4976b4b7b49d372bc732.pdf?index=true
    • https://39ab7af9-8942-43b9-be75-e8358bab7122.filesusr.com/ugd/9cb112_9c3be99c90c0481698727c1750a4688b.pdf?index=true
    • https://4fef59a1-b675-42c3-9f05-d17baae66bdd.filesusr.com/ugd/de3d83_a6bdd94a73f24a058d6118ff40da1737.pdf?index=true
    • https://5fcdfebc-fb4d-42f6-b02e-4ed2836a8fff.filesusr.com/ugd/fd30ac_78dce352e3424ce387760c717030882a.pdf?index=true
    • 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_off00006af5.bin
4ff6b10ebc6eb80767a163047377c0cd9ad86d459a7a1c0003bff550fa71b6ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF5 4892 bytes
font_01_sfnt_off00007bc4.bin
129b8ad08a7914e42a37d4481c4f92ccf23e35cdbd1ef4ec1d736bbb3704666a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC4 10332 bytes

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