Malicious PDF — malware analysis report

Static analysis result for SHA-256 c793c5c461f7ac5a…

MALICIOUS

PDF

49.2 KB Created: 2020-08-29 12:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83e8e95558ed1afd0a74930fcc6ff23c SHA-1: 1ea35768f935b4ba4db478bedb6c1c9e1584f4b3 SHA-256: c793c5c461f7ac5ae064b24918aeac70581bc696639dd958182cf1ac452e317e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. The primary malicious link, 'https://ttraff.com/wix?keyword=jhak+maar+ke+mp3+download', is identified as a redirector to malicious infrastructure. The document body text, though partially obfuscated, also contains this URL, suggesting a lure for users to download content. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or redirection attack.

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/wix?keyword=jhak+maar+ke+mp3+download
    • https://static.usrfiles.com/ugd/b8c837_84ffaf7a36a94757a98a5ce6466eac04.pdf
    • https://static.usrfiles.com/ugd/b8c837_447a6753bb234add81661ee07112d95c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2cb3a4d89764a438a4b9782b91d9e0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8e4233f8f154bb7a74a9e530c66b294.pdf
    • https://static.usrfiles.com/ugd/b8c837_fafa41c826854254940890c10bed8360.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/fefatefubomu.pdf
    • https://cdn.shopify.com/s/files/1/0446/2441/2835/files/bolapikofuwutezabanenopug.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8789/files/bikobepoximo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/bivawima.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/87165595167.pdf
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/approaches_in_teaching_reading.pdf
    • https://cdn.shopify.com/s/files/1/0428/3455/9143/files/la_evaluacion_en_el_aprendizaje_cooperativo_johnson.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/155592633.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/binary_and_hexadecimal_number_system.pdf
    • https://static.usrfiles.com/ugd/b8c837_460e621536cd40388d6caf65b8a8bf42.pdf
    • https://static.usrfiles.com/ugd/b8c837_32d3486222454cd68abd59b2f62f3870.pdf
    • https://static.usrfiles.com/ugd/b8c837_0887dcaaabfa42f485b4679c9130eee4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5333afdbc4d48c2979e4d8585a24a4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_da184cc2007d4a55b383342e8a576f75.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_off00006689.bin
0a9da8a53d64ad2ef4e11c34f1f09b79578bfcf8627a0c3e10e1f0679d1a5f77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6689 4992 bytes
font_01_sfnt_off0000775a.bin
52f4abe44d4f03e9ae360436724cae40654c4675929ce21daa3cc19707de4359		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 16280 bytes
font_02_sfnt_off0000a9a5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A5 4324 bytes

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