Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6372eefbd1737e1…

MALICIOUS

PDF

40.8 KB Created: 2020-08-04 02:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d86f09a332dc0b3155c57b27757c549 SHA-1: 45ea6299d712be078511c5180c27468fe43ec62f SHA-256: d6372eefbd1737e140e5dd1ec6bd95153c1087b7d2b86d604ecac140b1c32615
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'pruebas ser bachiller 2020 resueltas pdf' and the malicious URL, suggesting a lure to download or access malicious content disguised as educational material. The PDF also contains a large number of external links, as noted by the PDF_SEO_LINK_FARM heuristic, further indicating a malicious intent to distribute harmful content.

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.cc/pify?keyword=pruebas+ser+bachiller+2020+resueltas+pdf
    • http://files.maraycosmetics.com/uploads/1/3/2/6/132682030/3236580.pdf
    • http://files.q-bos.com/uploads/1/3/1/8/131856883/3807978.pdf
    • http://files.kwsa.ca/uploads/1/3/1/3/131398145/govekimezarisi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/lulitetirowupifexevud.pdf
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/vibufebevofasirapuviw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2933/1100/files/vatofiwowokimuvose.pdf
    • https://cdn.shopify.com/s/files/1/0428/2669/4822/files/laminates_and_veneers_in_dentistry.pdf
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/43857289626.pdf
    • https://cdn.shopify.com/s/files/1/0435/7357/5841/files/69911350568.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/16704567471.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/rujuvinunijemoro.pdf
    • https://cdn.shopify.com/s/files/1/0440/5349/5958/files/21040013697.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/76029145068.pdf
    • https://cdn.shopify.com/s/files/1/0438/9886/3771/files/37540666474.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/netepazabefi.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_off0000500f.bin
21945cd78125e2cc74494c88f5edefa2746061a6a97d18d3afd5e4f285a881c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x500F 5324 bytes
font_01_sfnt_off0000622e.bin
955791799cf1e26d3fcd7010a316a887fe58cd02ecbad1d377c484672cff117e
pdf-font-stream PDF embedded font (sfnt) at offset 0x622E 11160 bytes
font_02_sfnt_off00008685.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8685 4324 bytes