Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4555647b20de95…

MALICIOUS

PDF

46.6 KB Created: 2020-08-23 19:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2230e08c731ee404946e15160fdabf6 SHA-1: 40b2299ee3a1cb71226654a418a09689f6be4f53 SHA-256: ee4555647b20de957d40950a1b73caece8398a42cf6363f43039879a103f66e8
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a high number of embedded links, many of which point to a redirector service. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body contains garbled text but includes the URL https://ttraff.cc/pify?keyword=cohort+analysis+template, which is likely the initial lure. The presence of numerous links suggests an attempt to obscure the final malicious destination.

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.cc/pify?keyword=cohort+analysis+template
    • http://files.artofmarika.com/uploads/1/3/1/0/131069839/4681861.pdf
    • http://files.parpets.org/uploads/1/3/0/9/130969699/7561720.pdf
    • https://cdn.shopify.com/s/files/1/0432/8728/1832/files/case_studies_in_information_technology_ethics_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/1859/8038/files/sx1272_lora_module_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/81080715192.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/70600866799.pdf
    • https://cdn.shopify.com/s/files/1/0432/1116/1768/files/15899120448.pdf
    • https://cdn.shopify.com/s/files/1/0437/4583/7208/files/15534692688.pdf
    • https://cdn.shopify.com/s/files/1/0438/2110/5309/files/foxabovodipojaxus.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/brilliant_pala_screening_test_question_papers.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/manoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/0842/5116/files/how_to_calibrate_gps_on_android.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_off00006edc.bin
485b0b63f566e15434cf0d8254d27bea495624b4aed6239a0b9cd02b6c68eeff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDC 5064 bytes
font_01_sfnt_off00007fe3.bin
e035dfa831b233684d13b27fc00f78ac6af260a43a97dfbfb6a4cd733e811cf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE3 2112 bytes
font_02_sfnt_off000089b4.bin
c6bd0b0a3f4c47b798b404d7c2cfd9686c8ebca6025c4608ecfc9526f619386f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B4 10496 bytes

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