Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4ce8b51bf69930…

MALICIOUS

PDF

40.9 KB Created: 2020-08-09 10:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5e261e331bb3870005475721c0174ec SHA-1: 229f159933b23e71616a10c83145ac06004c7f16 SHA-256: 3e4ce8b51bf69930d0dd532a158590e2dfa9c1166de6b22037d36ae78664c052
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, a technique often used for SEO poisoning or to obscure malicious activity. One of these links, 'https://ttraff.com/pify?keyword=environmental+analytical+techniques+pdf', is identified as a malicious redirector. This suggests the document is part of a campaign to lure users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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=environmental+analytical+techniques+pdf
    • http://files.nicolecosh.com/uploads/1/3/2/7/132710748/4318318.pdf
    • http://files.mariposasummerfunstreetfair.com/uploads/1/3/1/4/131406841/68b339e.pdf
    • http://files.dolphincircle.org/uploads/1/3/1/4/131413550/05123.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/25934131165.pdf
    • https://cdn.shopify.com/s/files/1/0435/4949/1359/files/vasaxuzipejarulepakewi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/pezipixakobixola.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/brand_identity_guidelines_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/nusavemukolijekudo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0881/9349/files/24461549768.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/nuvezubupu.pdf
    • https://cdn.shopify.com/s/files/1/0445/3564/4319/files/asset_management_a_systematic_approach_to_factor_investing_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0451/0508/6616/files/the_bible_timeline_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/27437119112.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/26460420993.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_off00005f35.bin
bb63b935526c771d087458984aa3c865d71ca2d2f15376f9cef8c70277b80aca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F35 5640 bytes
font_01_sfnt_off00007244.bin
04f5d34dbb78c6f63efd44273912ece0071ee0c7b4416869c8b415a44735aacb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7244 10696 bytes

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