Malicious PDF — malware analysis report

Static analysis result for SHA-256 e810d2160174d604…

MALICIOUS

PDF

34.3 KB Created: 2020-08-16 18:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4fa32b8f76045add476e30882191388 SHA-1: a64310bc6a175c70e548e0fc0b11f338f23e555b SHA-256: e810d2160174d604f2fecc7d0976b4f951ada77b79f15dba41aa38aa45ead511
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.ru', are likely part of a phishing or malware distribution scheme. No scripts were extracted, but the structure suggests a lure document designed to redirect users to malicious content.

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.ru/pify?keyword=non+chronological+reports+year+3+animals
    • http://xugewev.mfautodetail.com/uploads/1/3/1/8/131872225/gonibufu-tetugop-vapigubebawaxal.pdf
    • http://files.abqcraftshows.com/uploads/1/3/1/8/131856160/poxafes.pdf
    • http://pezugudu.frenchstandardpoodles.com/uploads/1/3/1/1/131164250/kutixivawotipezevo.pdf
    • http://sekaf.en.philippeweppernig.com/uploads/1/3/1/4/131452883/363e1d.pdf
    • http://files.craftofscientificwriting.com/uploads/1/3/1/0/131070751/lotetob.pdf
    • https://cdn.shopify.com/s/files/1/0437/9571/0113/files/towogozanisigupuwutazi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8157/8136/files/nakabexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jivanup.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/aerosinusitis_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/warefikesotoro.pdf
    • https://cdn.shopify.com/s/files/1/0437/4118/4165/files/phytochemical_screening_and_antioxidant_activity_of_medicinal_plants.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/angina_de_pecho_tratamiento_fisioterapeutico.pdf
    • https://cdn.shopify.com/s/files/1/0443/3425/2188/files/ielts_speaking_part_2_and_3_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/66771299578.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/81607283184.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.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_off00004890.bin
d8df36cc9a931d5ca1b525369ccfd5b5e41b8193702b6a67dad2c94cc71a5e44
pdf-font-stream PDF embedded font (sfnt) at offset 0x4890 5580 bytes
font_01_sfnt_off00005b60.bin
39a71f22525d31cda191252a8eed0a00acc8b8a43031bf9551f5ea78fc62eca8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B60 9628 bytes