Malicious PDF — malware analysis report

Static analysis result for SHA-256 db800662b04cc93e…

MALICIOUS

PDF

41.0 KB Created: 2020-08-27 22:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc3b2105a0adaf2d2a0304b6534e1409 SHA-1: 9885375ceed8c2f21fd84f1ea39a6957a5daac88 SHA-256: db800662b04cc93e8ba81737becaa6dd86e8b4ae0b6c1537def46c050fda15b3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector pointing to ttraff.com. This suggests the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly indicated 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=roupa+colorida+encardida
    • http://files.huimalamaokekai.org/uploads/1/3/0/9/130969873/7881034.pdf
    • http://figen.artatvalleylakegallery.org/uploads/1/3/1/4/131483036/672382.pdf
    • http://files.upwardboundcamp.org/uploads/1/3/1/3/131379923/rogovifomusitedone.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/2625127884.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1425/files/lineage_2_revolution_kamael_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/diluged.pdf
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/play_store_software_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/12848165450.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5175/files/estrategia_corporativa_michael_porter.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/puvetafifizekepakuxuruli.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/convert_to_word_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4677/2646/files/mansfield_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0450/4797/1990/files/toefl_english_test_sample.pdf
    • https://cdn.shopify.com/s/files/1/0428/8947/8307/files/the_buganda_agreement_1900.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/fimudutewuzuvag.pdf
    • https://cdn.shopify.com/s/files/1/0438/5744/5029/files/bitoboguvututubizovisewul.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_off00006392.bin
5b33c28ab9dcb5edd93a6ec114c1a0adefee22c4582bd99edf6f7f9222389fd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6392 4896 bytes
font_01_sfnt_off0000744a.bin
af1d912b360b5d6c3348a6332450d1779b63efd48becb3a8c5be5e5623a89b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744A 10296 bytes

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