Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d76ee5a5860c15…

MALICIOUS

PDF

46.2 KB Created: 2020-08-10 09:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b78eb52dcd61de56f0928144ec828147 SHA-1: 17b7d6823d642a4146b35c33ac66f5fab5a73e6b SHA-256: 38d76ee5a5860c15ec044d50106e8b55bda9673164ecec15d1a7bbf430c9fb7e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'centroid centre of gravity and moment of inertia pdf', suggesting a lure to disguise the malicious intent. The presence of numerous links, many hosted on Shopify, indicates a link farm designed to distribute malicious content or phish users. No scripts were extracted, and the primary threat appears to be the embedded URLs.

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.ru/pify?keyword=centroid+centre+of+gravity+and+moment+of+inertia+pdf
    • http://files.naturalcityfurniture.co.uk/uploads/1/3/0/9/130969465/6695242.pdf
    • http://files.michelleshampton.com/uploads/1/3/1/4/131453156/a2c715a4.pdf
    • http://files.danfiorella.com/uploads/1/3/1/3/131381804/9795560.pdf
    • http://files.appleridgecooperativehomes.com/uploads/1/3/0/7/130775848/tobuzozu-vagefag.pdf
    • http://files.drbeccasbackyardbiology.com/uploads/1/3/1/0/131071072/vewotelas-lomenufusebo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4919/5419/files/circadian_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/kobedimagegaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/92302144304.pdf
    • https://cdn.shopify.com/s/files/1/0436/7882/6661/files/9029573249.pdf
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/98856401282.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9204741539.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1592/files/kafugu.pdf
    • https://cdn.shopify.com/s/files/1/0448/3717/5456/files/xipefexatak.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6867/files/install_sierra_on_virtualbox.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0245/files/44043837480.pdf
    • https://cdn.shopify.com/s/files/1/0434/4243/8310/files/namibojave.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/national_design_specification_for_wood_construction.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/dapuwezuruxumafikex.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_off00006b7f.bin
541f5720de000853a4411c115ca830d1a43629e9c21ad625dab0a31b54874c96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7F 1928 bytes
font_01_sfnt_off0000749c.bin
238524add52af4fc220b43bef5eb2aaece31c33417aaaac492d95a1f2d7bb67f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749C 5332 bytes
font_02_sfnt_off000086bb.bin
30d24309a69ca55255c41ae600c3930677b657a03bfb5c3378e57bec5f92d350		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86BB 10616 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.