Malicious PDF — malware analysis report

Static analysis result for SHA-256 6255a56dd046ed7f…

MALICIOUS

PDF

43.9 KB Created: 2020-09-09 17:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 55048f0ed1ff6ba33227dc0cc1f59ee8 SHA-1: 5188c95e26955afe9a1b5263d0819d129d6970b3 SHA-256: 6255a56dd046ed7f2016c15e9301e43104df95f9747cfdd5fdbb47a6497996ae
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'ttraff.club', which is a known malicious redirector. Additionally, PDF_SEO_LINK_FARM indicates a large number of embedded links, many of which point to Shopify-hosted PDFs, suggesting a link farm or distribution network. The ML classifier also strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.club/wix?keyword=parts+of+manual+bp+cuff' is the primary IOC, likely leading to a malicious payload or phishing page.

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/wix?keyword=parts+of+manual+bp+cuff In 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/1/0433/8148/9818/files/35518562951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7224/2342/files/movoweguvaxumumijil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/ingenico_ipp320_setup_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0523/8692/files/satav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/is_vshare_safe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fb41f9_1de8c3e0ed1440fd9ea881abb6354f7d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/modikok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2779/9970/files/3d_scanner_apk_samsung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4325/3406/files/sebia_capillary_electrophoresis.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2f3ac6_5464d71d045441d2adc856c6b6782afc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3ba1575a95e042ae8e625d3dd533067c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3de8a6_278cbec01dac4f19ad4c7e6b429a826b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/529385_5d512f630cbd4e6dbf6d5bda9d19b196.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fb41f9_b6cff9c7a5f44f5ab6b21a32200f7968.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_off00006697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6697 5300 bytes
SHA-256: c28fefd2cf3bafffda1167745332990dc92f957fe34d74bf1ad1b2082aa6a122
font_01_sfnt_off00007886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7886 12756 bytes
SHA-256: 31e360d0593e8e3ff45b53ff9b745486ece123056b37de09866254c38e110b6c

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