Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f684c854fb9096…

MALICIOUS

PDF

36.3 KB Created: 2020-09-06 15:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6da8a6f998a58173cabe7eaea915ffae SHA-1: c0dd87a23982d89c790fd8cd09129808d25ef68c SHA-256: 48f684c854fb9096f2def36251ad123304faa95e1d83dc74212efe514ccc02f7
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, directing users to 'https://ttraff.club/wix?keyword=weather+report+brainerd+minnesota'. This URL is presented within the document body, disguised as a search result. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents, many of which are hosted on 'static.usrfiles.com'. The primary malicious intent appears to be redirecting users to a potentially harmful site via a social engineering lure.

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.club/wix?keyword=weather+report+brainerd+minnesota
    • https://static.usrfiles.com/ugd/b58d21_64295593c4c3434280606de6597bda89.pdf
    • https://static.usrfiles.com/ugd/902d29_59f8144f4c0d4cd9a185b983323ddf1a.pdf
    • https://static.usrfiles.com/ugd/b8c837_39e4fce23e094c38b95c59222cf2cbd7.pdf
    • https://static.usrfiles.com/ugd/d55797_b4f164c7b3224aa6889f7d6d446546e6.pdf
    • https://static.usrfiles.com/ugd/3254bf_91ecff720ffb42e19fde883f2bad59a2.pdf
    • https://cdn.shopify.com/s/files/1/0430/7710/7865/files/tugabikenagedivujeriper.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/dogixowazesimekafipi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/happy_birthday_telugu_movie_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/timken_bearing_interchange.pdf
    • https://static.usrfiles.com/ugd/27135d_62ffdfa354a0432587771892840b1b44.pdf
    • https://static.usrfiles.com/ugd/11276f_35906df7868648c7bf48c9f717e6dd9a.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_off000050ae.bin
81acc11cb5c3abb201b36d71d03e147ed4a49093fc575dbf8754e33539af82fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50AE 5320 bytes
font_01_sfnt_off00006299.bin
2052caed18a2bcd1fb03352af4923d13b8dddc6edcc18e489dadcd935d1a11a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6299 9960 bytes

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