Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a455d10165e67e…

MALICIOUS

PDF

63.3 KB Created: 2020-10-06 22:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 31be57f255d94ce7d1767e7c979766f0 SHA-1: f3446d8b45921296ea6a7e4c2969a481577580bc SHA-256: b3a455d10165e67eb8b66439035c22f39b2ed4a39666522ad9fcaf0f13e6dec7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/pify?keyword=fruta+de+pan+in+english'. It also exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0435/4369/1413/files/metro_arms_1911.pdf'. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, likely for phishing or malware delivery.

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.club/pify?keyword=fruta+de+pan+in+english In PDF document text
    • https://site-1039427.mozfiles.com/files/1039427/19195071371.pdfIn PDF document text
    • https://site-1039668.mozfiles.com/files/1039668/bedanutu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4369/1413/files/metro_arms_1911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/sucesion_de_fibonacci.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/fanokupivobizivuxosobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/xlr_to_usb_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5240/7704/files/performance_pool_and_spa_waite_park.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9989/4175/files/snow_apk_versions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8520/5149/files/mini_ethnography_ideas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9494/2919/files/is_a_zygote_cell_haploid_or_diploid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4567723f-833a-4300-a360-e00a7f8c6f5d/39291466352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c89ae7c-275e-4b01-9a12-19e2bd46e088/9510454216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212478e2-4212-4e62-abca-c727b11cdd9b/vipusubitadaninafo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB06F 5176 bytes
SHA-256: ee72bd399ca9c2cca28d909a533cffa0a916b091d5425b70f16876ac64719bbe
font_01_sfnt_off0000c208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC208 14896 bytes
SHA-256: 96d4ad0457a95c31b669ec88496c317ce5274db2c996fb30bb8d3a77908991ec

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