Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82622946f54513a…

MALICIOUS

PDF

43.0 KB Created: 2020-09-04 06:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68a53a76fbb9b44c3eeb81f7e83d0bc1 SHA-1: 1033d563059c1ffd24520cecacad8afd505ede7f SHA-256: c82622946f54513a419045b58db34dd1790f01a4baa95de7067aa0c08ad1851a
120 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'Marvel cinematic universe knowledge quiz answers' and embeds multiple links. One of these links, https://ttraff.me/wix?keyword=marvel+cinematic+universe+knowledge+quiz+answers, is identified as a malicious redirector. The document also features a large number of external PDF links, many hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

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.me/wix?keyword=marvel+cinematic+universe+knowledge+quiz+answers
    • https://static.usrfiles.com/ugd/b8c837_e9df1785c73f44e180cbcac098638223.pdf
    • https://static.usrfiles.com/ugd/b8c837_851f96e37cb9445dbee9da648d5e6290.pdf
    • https://static.usrfiles.com/ugd/b8c837_a33d3cda790a4d43ba951291a5ab1ebf.pdf
    • https://static.usrfiles.com/ugd/067ecb_eeeec8e0864045638e707a5b82bfcc76.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd14f7741d064e7fa4c6a787b5d1c254.pdf
    • https://static.usrfiles.com/ugd/625844_1dbff4ec180649329ceb412417f76000.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ea82feab48846e2affe08e1fd49485a.pdf
    • https://static.usrfiles.com/ugd/cece23_8d55670b798846528b9cea8a8ddce14c.pdf
    • https://static.usrfiles.com/ugd/0df15e_981ba5e903864de296afd0a42395007e.pdf
    • https://static.usrfiles.com/ugd/c0b427_3517e58bbb1a481fab4126e3ab2590fb.pdf
    • https://static.usrfiles.com/ugd/bcfc12_12937fcdc6984acb86530e2244bdff63.pdf
    • https://static.usrfiles.com/ugd/31593d_288283ac52c24b458275465799561d42.pdf
    • https://static.usrfiles.com/ugd/2274a7_45c92c7c7d884751879c52b73c993328.pdf
    • https://static.usrfiles.com/ugd/1decf9_3641ed29ceb84305a3dd051dce2a2b89.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_30735cdeae0346099bf9ce300174cd5d.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_off0000684e.bin
ef0b436aad87006c4b0df099213dadc5bc017fefe290aa667212add7d598b2e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x684E 5656 bytes
font_01_sfnt_off00007b97.bin
fa16d85a4aa458650410d2f3f7ddadec807f048a3f69322af4311a0c63cc783f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B97 10404 bytes

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