Malicious PDF — malware analysis report

Static analysis result for SHA-256 73902c3c748e17ea…

MALICIOUS

PDF

52.5 KB Created: 2020-08-12 10:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bb2d226b6bf24237832918a2e1ab241 SHA-1: 7c02e0e2272a9c21a13a741fb3db1d758b8f3c00 SHA-256: 73902c3c748e17eab0734f9f1f553a599f4286430ec7887ce109c7f9e66631cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains hosting PDF files. The primary malicious URL is 'https://ttraff.com/pify?keyword=bauhinia+purpurea+pdf', which is likely used to redirect users to a phishing page or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=bauhinia+purpurea+pdf
    • http://files.pfeveryone.com/uploads/1/3/1/3/131384771/rakugowewiziba.pdf
    • http://files.judithgoldstonedesigns.com/uploads/1/3/1/6/131607022/vizivilivofi.pdf
    • http://nenikez.miletomarathon.com/uploads/1/3/2/7/132712358/direjimukotojek.pdf
    • http://wedesum.zionaquino.com/uploads/1/3/0/9/130969959/9352935.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0437/6566/1845/files/classic_hunter_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/65931117273.pdf
    • https://cdn.shopify.com/s/files/1/0452/3307/8429/files/arcturus_trumpet_solo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/kobuzarogufixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/letter_counter_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0429/5258/9465/files/gifefulesajik.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6163/files/31574190120.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/72143936877.pdf
    • https://cdn.shopify.com/s/files/1/0430/9788/2773/files/33839323935.pdf
    • https://cdn.shopify.com/s/files/1/0429/1801/9235/files/calidad_de_vida_relacionada_con_la_salud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dosadibevejigavo.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/
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066e7.bin
23d5d8f5b86c4155a6eaa3442eedd69e78ff99e3c3a3f84818c5c29a38502bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E7 4968 bytes
font_01_sfnt_off000077c3.bin
b36c6c6a2d082313027667b87864022fb428332d8d389468806e5727219e933b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C3 3472 bytes
font_02_sfnt_off000084d2.bin
81eba36cfda688bc1ae30ccadb829a71e4bb2053942efe72aa8337a9698b94eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D2 4296 bytes
font_03_sfnt_off00009290.bin
cd1c01e2714e8457b6f51da7f57349ad2ef5ee63ee48617d6ffe958bc7e790b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9290 10604 bytes
font_04_sfnt_off0000b705.bin
f34e56a088a6831d2f56b658b2d46ba014a57e244f45915abcb5df653e93ccc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB705 3248 bytes

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