Malicious PDF — malware analysis report

Static analysis result for SHA-256 58fae18793ab11a2…

MALICIOUS

PDF

40.3 KB Created: 2020-08-07 18:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 022a4cf9d5890e294cb1fff47da18e37 SHA-1: 6dc78ac6de0860029894d5e6a28ed49994e091d7 SHA-256: 58fae18793ab11a2303165fac42fee6076cd345b97ba5ac2e7e7a5a11295e1fb
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, indicating a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=br%25C3%25BCche+multiplizieren+textaufgaben+pdf. While no scripts were extracted, the structure and heuristics strongly suggest the document's purpose is to lure users to malicious sites.

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=br%25C3%25BCche+multiplizieren+textaufgaben+pdf
    • http://files.leannajaneyoga.com/uploads/1/3/0/7/130776401/49fb4cf18075.pdf
    • http://muvefunef.revartmontana.com/uploads/1/3/1/4/131437363/vumuvuvapu.pdf
    • http://xufat.theomgdonutshop.com/uploads/1/3/1/8/131856772/memakewaxutevi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/job_interview_questions_and_answers_esl.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/chair_exercises_for_seniors_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/28283075283.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/niwudivupobofujotoxokire.pdf
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/tetris_html_code.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/action_day_planner.pdf
    • https://cdn.shopify.com/s/files/1/0432/8813/3787/files/sigefu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8099/0366/files/35646193689.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/83306456581.pdf
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/breadboard_circuits_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0438/1917/2000/files/30704118375.pdf
    • https://cdn.shopify.com/s/files/1/0434/2516/9565/files/losafazeluxutufosupako.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/xibibokisarit.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/dotasadupabinamoligixozuf.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_off00005b4f.bin
16e9b89739e55bd2d1e355343710eed9b572a471da8c3a53309135e58d399b83
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4F 5820 bytes
font_01_sfnt_off00006ecd.bin
ef4f34e22f1875fad90a9e2b2c53806aa1ad99444730ed0c26f522a602f1581a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECD 10732 bytes