Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb51a28f184c2f9…

MALICIOUS

PDF

37.3 KB Created: 2020-08-31 13:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8931e029d0ca26c6571601cc65121861 SHA-1: 4159f1fb9faa6b6285024cffd7928701046b0647 SHA-256: ecb51a28f184c2f95b3293a543928a33d6619db71acedb92564cdb95d3ff86fc
120 Risk Score

Malware Insights

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

The PDF document contains a lure promising a TV show download, which is a common social engineering tactic. It embeds a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF also contains a large number of external links, suggesting a link farm for SEO poisoning or traffic generation.

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=descargar+true+blood+temporada+1+subtitulada
    • https://static.usrfiles.com/ugd/5899d5_7fd604b5c33f46be87b3927bdaaaefe2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ccf468dcf2bc49ac84922b3fc48405da.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fab0fb2f8284ee8a177317f2dddbf43.pdf
    • https://static.usrfiles.com/ugd/6cfc61_35c27a428f394cc989dce14427a3ae0e.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_eb9179dff3544d7b8b0467043f7960c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd4a7e60274e4d42a243b4931c649e09.pdf
    • https://cdn.shopify.com/s/files/1/0433/2994/5758/files/vijufezu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/pojikudidot.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/causes_of_anxiety.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/graphing_absolute_value_functions_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5654/files/lobufonawukaraziminuku.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3438c9ce42e43fda0f973d6262c13d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed0b716124984bd295055a03a17a085f.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_off0000528b.bin
da9728ce3a2343d910f519f01abb13318331d43b1437a9538bcbc93879a4fe7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x528B 5584 bytes
font_01_sfnt_off00006578.bin
621d3e44426313417132892def158e8514d6588f9b688ba000e54af23199fe57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6578 10192 bytes

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