Malicious PDF — malware analysis report

Static analysis result for SHA-256 958cc44177ed2639…

MALICIOUS

PDF

43.7 KB Created: 2020-09-01 00:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83c2a605b7286d9d36ec869c33213745 SHA-1: 70d1a3b74a9e0d00704a525c876a470b9ce51684 SHA-256: 958cc44177ed263902b03e3c79fd10c5a4bb4ad35da2e933ecbe9d2a0580120f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with this finding. The file also exhibits characteristics of a PDF_SEO_LINK_FARM, suggesting it's part of a larger scheme to distribute malicious links. The primary IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware distribution site.

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=ancestry+family+tree+template
    • https://static.usrfiles.com/ugd/b8c837_441bc173269a423b8cc0cf9aab728601.pdf
    • https://static.usrfiles.com/ugd/97634b_927e07ee45d04e53a65919104659979e.pdf
    • https://static.usrfiles.com/ugd/3aee12_9e5a04ba32fa40cf84d9e71b303a242a.pdf
    • https://static.usrfiles.com/ugd/93c935_964f9613693c4fc884affcaf5e01ba34.pdf
    • https://cdn.shopify.com/s/files/1/0435/9425/2456/files/c_r_p_f_form_2018.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/litije.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2951/files/xirawabamome.pdf
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/gowofuwapozaridulogopivi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/think_like_a_man_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/wrong_turn_2_dead_end.pdf
    • https://cdn.shopify.com/s/files/1/0439/9782/3134/files/nih_reporter_login.pdf
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/libros_de_instrumentacion_industrial_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/rusebage.pdf
    • https://cdn.shopify.com/s/files/1/0440/0722/7542/files/sinamogexufepemeranuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/connaught_junior_school_bagshot_ofsted_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/ballast_water_record_book.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_off00006e38.bin
ce3b8767489382bcac835eeaaeb677ceba9d9a9d6c37a3117b3672ba30a1dcc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E38 5252 bytes
font_01_sfnt_off0000800d.bin
d3a8f08b75aa62961b7b5812eb1d83cef24184f86410096e60aa422a4b175e61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x800D 10008 bytes

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