Malicious PDF — malware analysis report

Static analysis result for SHA-256 1deca0c18fba00ec…

MALICIOUS

PDF

46.7 KB Created: 2020-08-18 15:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff4a23ba050ade19c5b022b5af7df597 SHA-1: 22779296dcf1c6dd599320b288ec376c3ef9341b SHA-256: 1deca0c18fba00ec4656d999667f9b9cee5756c952c78004e2abf868168d8f2f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, indicating a link farm. One of the primary links, https://ttraff.ru/pify?keyword=ielts+writing+task+2+types+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the topic 'Ielts writing task 2 types pdf', suggesting a lure to attract users to click on the malicious link. No scripts were extracted from this sample.

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=ielts+writing+task+2+types+pdf
    • http://files.saintlukebv.org/uploads/1/3/1/6/131606491/kobaxisoteporaxexego.pdf
    • http://files.tewkesburybbc.co.uk/uploads/1/3/1/4/131406535/1093196.pdf
    • http://files.sirius-nutrition.com/uploads/1/3/1/6/131637306/zojufimezo.pdf
    • http://files.nellasquestinc.org/uploads/1/3/0/7/130776230/zupimomek.pdf
    • http://files.halloween5k.co.uk/uploads/1/3/2/7/132740502/092ea325.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovovowegafakaroseras.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/28367226882.pdf
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/46465231585.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4965/files/27599049487.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/574869212.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/92996687713.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/9116937178.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/3662583209.pdf
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/funny_university_names.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6904/files/62031516431.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/fipuzupaxixipumisiwowi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7064/files/42699181910.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_off000077aa.bin
bce52ea7c798425f1ba8750f1bf38a3c8317ca9e1bb97473cc92837da4ecfcbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AA 5536 bytes
font_01_sfnt_off00008ab0.bin
db0e5a85a960b83dc4c41cbcb5d116b15bc7fe4cfc76fa08260e4e21839492a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB0 10460 bytes

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