Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebd5bc53e906b59…

MALICIOUS

PDF

56.5 KB Created: 2020-08-11 02:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98acb754bf993eee49ccb36e53494d54 SHA-1: bf721b556ece0eb5aceb2ec7c087d7e1e3db1f6a SHA-256: bebd5bc53e906b59cfcb0e6ed1394f469bb9f24f37f38963431bb0dbce0f6e6f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.com/pify?keyword=metabolisme+karbohidrat+protein+lemak+pdf' is the primary indicator of malicious intent, likely serving as a gateway to further malicious content or phishing pages.

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=metabolisme+karbohidrat+protein+lemak+pdf
    • http://files.eleanorroseoutdoorquiltshow.com/uploads/1/3/2/6/132695805/lubonopokekubovep.pdf
    • http://files.cornwallplants.com/uploads/1/3/1/3/131384468/xilefo.pdf
    • http://files.nirunutrition.com/uploads/1/3/0/8/130814052/1316723.pdf
    • http://files.agendadocumentary.com/uploads/1/3/0/8/130814492/9972064.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/pudonudedobiramusi.pdf
    • https://cdn.shopify.com/s/files/1/0443/6430/0444/files/cesarea_humanizada.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/90265231445.pdf
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/19033470518.pdf
    • https://cdn.shopify.com/s/files/1/0430/9663/7597/files/how_to_improve_sense_of_humour.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/vewovixurezokexuwuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/zikej.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6421/files/dictionnaire_allemand_franais_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2882/files/gaxunidugipirigovus.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_off00009ee1.bin
557e965f08b2d8bf7c8a32ff781aeeb4700ea9156905cbd1864c817f5936bd72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE1 5488 bytes
font_01_sfnt_off0000b163.bin
9b893959ca2f2f7e4f9921996c03b0f3c10aabe69a3a6db77a456f429bf195ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB163 10364 bytes

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