Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f78dc0d92d8f91a…

MALICIOUS

PDF

51.3 KB Created: 2020-08-26 06:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6f1dc4a9051b8d2069325abf7958ee3 SHA-1: 16547b42f478584d8caf07c1aea190def0b6385d SHA-256: 3f78dc0d92d8f91a789f2d8f1a6991ff969a8a04d3aab853f4cef4e152428f2d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary malicious redirector link to 'https://ttraff.com/pify?keyword=primera+condicion+de+equilibrio'. This indicates a phishing or scam attempt, likely to redirect users to malicious content or a phishing site. The ML classifier strongly supports the malicious nature of this PDF.

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=primera+condicion+de+equilibrio
    • http://fumugito.amberwavescounseling.com/uploads/1/3/1/4/131483083/toravofovabub.pdf
    • http://tibur.improvplayground.com/uploads/1/3/1/6/131606457/dugixonofoli.pdf
    • http://files.motherwilsonswisewords.com/uploads/1/3/2/6/132681464/defito.pdf
    • http://files.rockyflatshistory.org/uploads/1/3/1/0/131069781/d335e5c831d49.pdf
    • http://javesaz.taylorlench.com/uploads/1/3/0/9/130969634/dowelugeruv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/44531733847.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9946/files/manual_transmission_fluid_check.pdf
    • https://cdn.shopify.com/s/files/1/0439/0433/6027/files/arabic_quran_in_english_letters.pdf
    • https://cdn.shopify.com/s/files/1/0450/9263/4789/files/breaker_mitsubishi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0469/files/21827151405.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/32244775373.pdf
    • https://cdn.shopify.com/s/files/1/0454/6569/8462/files/ejercicios_resueltos_de_anualidades_vencidas_y_anticipadas.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/94320363763.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/mudakeraxikisuronorikate.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/52987712195.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/causality_models_reasoning_and_inference_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/12547900622.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000728c.bin
b3b2fdd212ef098bc7a4bfcf862fea2f31791599c81a47e9869c49c1ccb59856
pdf-font-stream PDF embedded font (sfnt) at offset 0x728C 5176 bytes
font_01_sfnt_off000083f2.bin
7790d3faff569f8940c92d6da547301a536e18b4fe57fcaf70779f546976905d
pdf-font-stream PDF embedded font (sfnt) at offset 0x83F2 11352 bytes
font_02_sfnt_off0000a88f.bin
bc7e3f6831be34686de02ce7be2a06b9f1fa2b1a298201cd6e3dc3baf4672bf7
pdf-font-stream PDF embedded font (sfnt) at offset 0xA88F 16376 bytes