Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a810a941a8c236e…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 01:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ef100d4f72d00f89e5eee9e925cc482 SHA-1: f3666fb99aafc1d3480bb63f6c64b5b9a307f312 SHA-256: 1a810a941a8c236e4ec21ac566bf089f2e0b10e4fbaac850a039d31c4b04944c
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, pointing to 'https://ttraff.cc/wix?keyword=carta+de+feliz+cumplea%25C3%25B1os+para+mi+esposo'. The document body, though partially corrupted, contains text related to a birthday card and the malicious URL, suggesting a social engineering lure. The presence of a link farm heuristic further indicates malicious intent, likely for phishing or malware delivery.

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/wix?keyword=carta+de+feliz+cumplea%25C3%25B1os+para+mi+esposo
    • https://static.usrfiles.com/ugd/b8c837_9606e8de32fc4678b6a6a434a3988853.pdf
    • https://static.usrfiles.com/ugd/66c878_bd210129cd764e25be5368ed72fdee40.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bdce39293c54a7a9f3752d5b4024c03.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/21801649833.pdf
    • https://cdn.shopify.com/s/files/1/0436/7617/2441/files/amenaza_de_parto_pretermino_manejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7967/9656/files/47431185494.pdf
    • https://cdn.shopify.com/s/files/1/0438/1822/1730/files/farubuvaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/fizifanada.pdf
    • https://cdn.shopify.com/s/files/1/0440/0198/4662/files/fovadiniguxaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/rolling_stones_top_500_albums_list.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2541/files/xasovifewalodom.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4214/files/rebanasajerutukukulefut.pdf
    • https://static.usrfiles.com/ugd/576447_8f4c7b34c8db40d2b003dd770e15daca.pdf
    • https://static.usrfiles.com/ugd/d1d005_ab7fd5c9dfb542ce8a773d226985736a.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_off00005f9d.bin
3ba16acde0f8776d059bed015471878ebb67fc335199ae49d6fa9a8c82ea75f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9D 5468 bytes
font_01_sfnt_off000071e7.bin
e4ca2b9418d2babc1597f9ffe97c7316f1241c858c1b43fcb9107ec3c421416f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E7 10652 bytes

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