Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ceaeaffbf734498…

MALICIOUS

PDF

44.6 KB Created: 2020-08-03 16:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40c8815291fa87ae4c24b9d168cd50f6 SHA-1: 60dc27f8bf823321d6ff0eb829430c1ea3a94c12 SHA-256: 3ceaeaffbf73449825ab72cd4ec52f7e331924573a3af2722f22a34d5e05628e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=oxford+dictionary+english+thai+pdf'. This indicates an attempt to direct the user to a malicious site under the guise of providing a dictionary PDF. The document body, though heavily corrupted, also contains this URL, reinforcing the malicious intent. The presence of numerous other links, many hosted on Shopify, suggests a link farm or redirection strategy.

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.cc/pify?keyword=oxford+dictionary+english+thai+pdf
    • http://files.frenchmanscreekshop.com/uploads/1/3/0/8/130814232/wutazo_mewiwa_kusis.pdf
    • http://files.canadianautomotivejournal.com/uploads/1/3/2/6/132680789/fumamifa.pdf
    • http://files.recycleyork.co.uk/uploads/1/3/1/4/131452958/topedugapunaki.pdf
    • http://files.jacobsarmoury.com/uploads/1/3/1/4/131483488/1641319.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/31215283084.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/79536721228.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3925/files/53459947634.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/code_discord_bot.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/4720486365.pdf
    • https://cdn.shopify.com/s/files/1/0435/5935/4517/files/am_i_evil_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/zabebuwigaxowigaxer.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/57608863860.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/bufejajobisavatudimi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/26003394807.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_off00006217.bin
4651b876f59530a6f9d4882363361c28ef4dae874b5e68f87ea598f908ac2661		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6217 5404 bytes
font_01_sfnt_off0000747e.bin
d6e58679997676dbc32909fc9be6923bd78f947ea7ef64134d6c3c5ef5c22808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747E 10304 bytes
font_02_sfnt_off000097ad.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97AD 4324 bytes

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