Malicious PDF — malware analysis report

Static analysis result for SHA-256 929bf7c7068ea096…

MALICIOUS

PDF

39.6 KB Created: 2020-08-14 11:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa076a616a12d49b23e28fca3d5f1ab5 SHA-1: 4e284a9414dc6f48557bef6d265daacdc345b1c0 SHA-256: 929bf7c7068ea096153e4ae53d795b0ad06a0fe47c338eb6ece37fe1171455b5
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text, though garbled, contains keywords related to exercises and PDFs, suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware download.

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/wb?keyword=never%20sometimes%20often%20usually%20always%20exercises%20pdf
    • http://files.mahalopanama.com/uploads/1/3/1/4/131453302/068b7235f.pdf
    • http://files.janebellinteriordesign.com/uploads/1/3/1/3/131379615/turitelujit.pdf
    • http://madit.yanktonspecialolympics.org/uploads/1/3/1/3/131398404/3240667.pdf
    • http://bofagiwe.goodspeedwatches.com/uploads/1/3/0/8/130814328/ed8586a1.pdf
    • http://files.valleyliberator.com/uploads/1/3/1/6/131606035/padavosagog.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/38298517340.pdf
    • https://cdn.shopify.com/s/files/1/0435/2373/5720/files/57886151066.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2536/files/java_oracle_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/10342639295.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/51582266893.pdf
    • https://cdn.shopify.com/s/files/1/0428/6601/6412/files/49074955510.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/zanirikaxizuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7679/files/63671414624.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/zuzimirupukibozim.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/laguwegasubamijofobemi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/kijutimewa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.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_off00004e64.bin
f659fcd0440f0c7959664f1589d16f0de023ee73b9e6a7be4ccb4111b0b7350a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E64 5476 bytes
font_01_sfnt_off0000610a.bin
410ba5c13d6265d59432211797af0ae8dd7546b2a068ac6b58ac472bc804fc32
pdf-font-stream PDF embedded font (sfnt) at offset 0x610A 9988 bytes
font_02_sfnt_off0000832e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x832E 4324 bytes