Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20ec9fdab3787d0…

MALICIOUS

PDF

47.0 KB Created: 2020-08-09 11:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3fc20d925695dbc2879e227ba0ba21c SHA-1: 0977c148600b0a954dfa3e1991e07548a1d5f04c SHA-256: e20ec9fdab3787d0b4f355d6705d563f717461e92f428eb1230e9b5fe42a822e
150 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure and contains a large number of external PDF links, suggesting a link farm for SEO manipulation or phishing. The embedded URLs, including the primary malicious redirector at 'https://ttraff.ru/pify?keyword=codice+calixtino+facsimil+pdf', are designed to lead users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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=codice+calixtino+facsimil+pdf
    • http://files.thekkadathindia.com/uploads/1/3/0/7/130776416/4257895.pdf
    • http://files.texasbestbrushes.com/uploads/1/3/2/7/132740519/mosuvurixaluzojonud.pdf
    • http://majojuse.fishinginketchikanalaska.com/uploads/1/3/1/3/131398455/5e8c8a.pdf
    • http://files.wlcbands.com/uploads/1/3/1/6/131607712/2769e0d94.pdf
    • https://cdn.shopify.com/s/files/1/0436/8069/4437/files/xijerolevevekuvozurimez.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/structural_reliability_analysis_and_design.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/18996286273.pdf
    • https://cdn.shopify.com/s/files/1/0450/6501/1352/files/oxford_english_for_computing_teacher_s_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/lasulotut.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/rowadewulematifomura.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3203/files/63310539831.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/rango_de_movilidad_articular_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/19691151308.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0610/files/welujiropokibufukiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/78245744252.pdf
    • https://cdn.shopify.com/s/files/1/0447/8792/5143/files/exercicios_de_atomistica.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_off00007b99.bin
205558be1159c473a7fcd24c86fa8b86552b6e640e74b150e8a7f947be4f012b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B99 5180 bytes
font_01_sfnt_off00008d2d.bin
b95564153a063c5cf64ecf9a9c43450e0f9f769da6c1301dd7df369f90964ea0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2D 9992 bytes