Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c1ddbe19130ce8…

MALICIOUS

PDF

51.4 KB Created: 2020-08-20 02:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc9f718748ac1d28106167ee3e915cdc SHA-1: 1a7888bbf095a06d980d545fa4fa92683cd7c5b6 SHA-256: 90c1ddbe19130ce883e8fb65489a8c728cc04282c6e2b92592a43ba47b46e95e
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=aterosklerosis+dan+arteriosklerosis+pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. The presence of a large number of external PDF links also indicates a link farm, likely for SEO poisoning or to obscure the malicious redirector.

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=aterosklerosis+dan+arteriosklerosis+pdf
    • http://files.bellavocesoin.com/uploads/1/3/1/4/131453124/7ce767e488.pdf
    • http://files.myollimaattacollection.com/uploads/1/3/1/0/131070331/rireberodefuleb_benivu.pdf
    • http://files.kingguideservicearizona.com/uploads/1/3/1/1/131163635/08488d8a8a6309e.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/risekumomivedopela.pdf
    • https://cdn.shopify.com/s/files/1/0428/3265/8588/files/25565091633.pdf
    • https://cdn.shopify.com/s/files/1/0428/6867/0620/files/woxunixogomaze.pdf
    • https://cdn.shopify.com/s/files/1/0462/2024/7194/files/tesusajuxopizomibojoromaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/9313/8333/files/siguwuxafesiwaposet.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/rujanoma.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/64702368931.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/patabuvomalosufujera.pdf
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/wastewater_treatment_plants_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/4324/8533/files/john_deere_317.pdf
    • https://cdn.shopify.com/s/files/1/0433/7382/2115/files/somatic_cell_hybridisation.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b95.bin
97be14884b8f631bf6e14d888240e4ac8f941fef9b6f72ec2f0a98df93ed34fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B95 5088 bytes
font_01_sfnt_off00009cf1.bin
8394c9bed9054e5fe4d4eecb25d15fb522b41915ebd34e45cc86942fb96ad7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF1 10344 bytes

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