Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2bdc90eeef9f2b…

MALICIOUS

PDF

47.2 KB Created: 2020-08-17 05:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f9d065356b4ebbc13eab3db2304bc77 SHA-1: 6f3d590266d740e8c6ee7d8f6e37aab9b97a1d51 SHA-256: 2f2bdc90eeef9f2bcf957101b9a8e6ca8e1854875a09f1d4fab191537feaa9f4
130 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=automobile+engineering+subject+notes+pdf'. It also contains a link farm heuristic, with many external PDF links, including one to 'https://cdn.shopify.com/s/files/1/0430/6976/7842/files/72841201062.pdf'. The document body, though heavily obfuscated, contains text related to 'automobile engineering subject notes pdf' and the malicious URL, suggesting a lure for users seeking study materials. The presence of a visual download button heuristic further supports the lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=automobile+engineering+subject+notes+pdf
    • http://files.mb-solutions.net/uploads/1/3/0/8/130813582/mivavopazamavag.pdf
    • http://tobofug.iemministries.net/uploads/1/3/0/7/130775291/b2f74d0df438e3.pdf
    • http://files.berksdogtraining.com/uploads/1/3/1/4/131407558/1a69f80348cb321.pdf
    • http://files.uoflphisigmarho.com/uploads/1/3/1/6/131607522/welawogoxunov-xudexo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/72841201062.pdf
    • https://cdn.shopify.com/s/files/1/0429/8414/5049/files/casio_fx-_260_solar_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0582/files/muzoduvajiwovujafux.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/59559930803.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9125/files/tedidiwumelonope.pdf
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/13541878163.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/migujivedipotowaxire.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/capital_budgeting_practice_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/4493/7628/files/torejogodedox.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1873/files/firasomafol.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/
    • https://cdn.shopify.com/s/files/1/0435/3087

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e61.bin
db48da67f68df521a268e728b9104e0a546eb4c7c99e695fcbef34c84606555f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E61 5352 bytes
font_01_sfnt_off00007076.bin
3d710a4b121cc3492c3eb33a949758d423697a96dc6070b99fa40abea3aa876d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7076 2116 bytes
font_02_sfnt_off00007a42.bin
a99e1a98ef2bfd4efab07129605ca38b3e42e94fa136340a709e0eaebc0b7dd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A42 11168 bytes
font_03_sfnt_off00009f1c.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1C 4324 bytes

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