Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3b65716e48c993…

MALICIOUS

PDF

72.1 KB Created: 2020-08-14 19:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb3db115c6611498ac6a14e33572ee58 SHA-1: 53adc9d7f610d60fa7a52b298b9542729256d3ae SHA-256: fd3b65716e48c993fa4fb7255269dc4c5c0049d44e0921102dd448d4a018b92c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic firing indicates a direct link to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains the same text as the malicious redirector's URL parameter, reinforcing the lure. The primary intent appears to be directing users to malicious infrastructure via these embedded links.

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=correct+plural+form+of+appendix
    • http://files.fitnessfactory1.com/uploads/1/3/0/7/130739567/3499249.pdf
    • http://files.omicronomicron.org/uploads/1/3/0/9/130969364/208808.pdf
    • http://files.glasgowsain.com/uploads/1/3/1/4/131406736/logoni-ginetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5522/6778/files/munazusanokuvaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/84069729495.pdf
    • https://cdn.shopify.com/s/files/1/0436/1001/3853/files/bodiviwuzug.pdf
    • https://cdn.shopify.com/s/files/1/0429/9777/6543/files/tidubemerokarigokevaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78986196578.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/tesaluridavapasijib.pdf
    • https://cdn.shopify.com/s/files/1/0441/3430/1848/files/87390567186.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/laluluzisimivomaxogabodiv.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f9f.bin
2c0e9c6b0c824f41799d020b916f65fb86ff5ecef5661f088b8b3061665de9dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9F 5540 bytes
font_01_sfnt_off0000a275.bin
d71401340b0158a11a64a5e8d4a0912794586c09c72b2387a1ac27e0950fcea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA275 5096 bytes
font_02_sfnt_off0000b3b0.bin
d95e1c4063504ecff3a160940f81f40bd43c8cb6ca1e65b6cf6d64da9304b14c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B0 3276 bytes
font_03_sfnt_off0000c066.bin
98e660a41aece45e7b8d02351aefba22e1f16254e77aadf7a005c3c05b3b9bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC066 12744 bytes
font_04_sfnt_off0000ea52.bin
4a0b71897eaa0588f17a1df231cc41e8953c760c97e89b3333bcf1893c90193c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA52 17896 bytes
font_05_sfnt_off000105fd.bin
2f74cbfcbebd3b9deb6a3115f88c8cd0f875585e8fa469d08603fb95e0227d1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105FD 2992 bytes

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