Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ccf0b0ce65b591…

MALICIOUS

PDF

54.5 KB Created: 2020-08-22 08:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c74bef3bbfc93de747dfb935983116b SHA-1: dd0714e28d52e834ef602e28ce37287630a2f42f SHA-256: 40ccf0b0ce65b5914a5bd59407c5ced2efa33ab5b618a706ee5ab19c3ff51be2
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is also present in the document body, suggesting a lure to trick users into clicking. The PDF also contains a heuristic for a link farm, with numerous links hosted on Shopify, likely to improve SEO and distribute the malicious content. The ML classifier strongly indicates maliciousness.

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=amma+video+songs+tamil+free
    • http://repewi.sacontracting.org/uploads/1/3/1/4/131406801/mujetowomopewap.pdf
    • http://lumazut.spmlsu.org/uploads/1/3/0/8/130874655/xijamogatiru.pdf
    • http://gabulomib.christopherparizo.com/uploads/1/3/1/4/131437502/rotijarus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/fisetusikagufugov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wulusiwebope.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/vutizujujiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/6477188607.pdf
    • https://cdn.shopify.com/s/files/1/0434/2241/7047/files/arabisch_lernen_anfnger.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/labefigogilipozobigoruw.pdf
    • https://cdn.shopify.com/s/files/1/0452/2462/4288/files/bearing_specification_skf.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/87153889991.pdf
    • https://cdn.shopify.com/s/files/1/0439/0685/9163/files/ave_maria_bach_gounod.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0742/files/63300778598.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/22941914905.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/20851952023.pdf
    • https://cdn.shopify.com/s/files/1/0447/1331/2409/files/zoxibiwaxuwesigoz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00007b46.bin
70ce729dea2621783a3add7def77308d1fb9ec83b06ad0f9cbd4341b65078e61		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7B46 12328 bytes
font_00_sfnt_off00006a2c.bin
59e2e37410ff49920114680f4a78d4349ba4f8bd14e9cce27ae3c011827c65d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2C 5064 bytes
font_02_sfnt_off00009b04.bin
175017906337435523b22716f0fe544aacc89f753775cb61aad4cbccea5bb01f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B04 10408 bytes
font_03_sfnt_off0000beae.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEAE 4324 bytes

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