Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b99688a173d320…

MALICIOUS

PDF

47.2 KB Created: 2020-08-18 13:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45cb16137d237c8328fdd55cad124ab9 SHA-1: 25ccb6686d67af9ff1d1b4a0758566594c33174a SHA-256: 21b99688a173d32090c77a49f106ff3baa51d9a2f80e6c088f0853403ab26a59
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a link to a known malicious redirector, ttraff.com. Additionally, it contains a link farm with numerous external PDF links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content. The document body contains the URL that triggered the malicious redirector heuristic.

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=geometrical+optics+questions+and+answers
    • http://pakogid.redbearoriginals.com/uploads/1/3/2/6/132681352/miwitizuxowomuwidif.pdf
    • http://zanoneros.teresaofavila.org/uploads/1/3/0/8/130814297/15b7290c5f3.pdf
    • https://cdn.shopify.com/s/files/1/0438/0858/7936/files/200_battery_life_app.pdf
    • https://cdn.shopify.com/s/files/1/0436/9688/1814/files/81821584517.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8437/files/32356008107.pdf
    • https://cdn.shopify.com/s/files/1/0439/0567/9528/files/past_simple_vs_past_continuous_exercises_perfect_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdf
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/batezifozuwiripukoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/xupepuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/mpdf_output_has_already_been_sent_from_the_script.pdf
    • https://cdn.shopify.com/s/files/1/0440/2148/1622/files/gemav.pdf
    • https://cdn.shopify.com/s/files/1/0438/3113/2322/files/watch_bleach_online.pdf
    • https://cdn.shopify.com/s/files/1/0450/8614/6712/files/tecnologia_e_innovacion_educativa.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_off00006375.bin
75522d3f637b1024bc1bcde58bf1d4764654eb1a10e6d95c1a9d4144c8fe6a4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6375 5348 bytes
font_01_sfnt_off00007591.bin
c69f2e665ac9fcd0a72051531e9f9b63d7ebc5296cf6d2cb149276fb71e8336b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 14020 bytes
font_02_sfnt_off0000a1ca.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1CA 4324 bytes

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