Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b7e2f479d337d4…

MALICIOUS

PDF

39.1 KB Created: 2020-09-03 06:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03b8aa7f5c2046e57ff75978f6b2414a SHA-1: 3a4b81ae36e4dc5e35958015a5c94b9c18794616 SHA-256: c2b7e2f479d337d4f8f9b1a19eea6b9c00877cc818fdcbafa4f9ef9d605f187d
168 Risk Score

Malware Insights

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

The PDF contains a lure for a cracked software download, which is a common social engineering tactic. It embeds multiple links, one of which, 'https://ttraff.link/wix?keyword=pdf+annotator+5+crack', is identified as a malicious redirector. The document also contains a heuristic indicating it's part of a link farm, likely for SEO poisoning to attract victims. The presence of a 'password-protected archive handoff' heuristic suggests the user is expected to download a password-protected file, further obscuring the malicious payload.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=pdf+annotator+5+crack
    • https://static.usrfiles.com/ugd/b8c837_35f541860a7a4d03b64aaf45e2b94f5f.pdf
    • https://static.usrfiles.com/ugd/99a8f2_b21f202b9d744aad8040d85c9338fb5d.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_21efb142d50a4841b35e3d10d586f18a.pdf
    • https://cdn.shopify.com/s/files/1/0436/2053/2384/files/vujin.pdf
    • https://cdn.shopify.com/s/files/1/0430/3241/2311/files/reviviwemofananafuporo.pdf
    • https://cdn.shopify.com/s/files/1/0462/8548/8288/files/4864733152.pdf
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/eine_kleine_nachtmusik_flute_sheet_music_printable.pdf
    • https://cdn.shopify.com/s/files/1/0438/9624/2331/files/apset_2018_question_paper_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/semigo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/administrative_office_management_13th_edition_free_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_c17d130facb3441690e2030855741e61.pdf
    • https://static.usrfiles.com/ugd/4cf28d_15b37524e16e4d99b1f60ec578a08f2a.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_off00005cb7.bin
3325ef7283843a952754ca71147a14585026cd9149b25568e5547d4215618935
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB7 4992 bytes
font_01_sfnt_off00006dd3.bin
ac192082f10b87a9867d7db97392a3a3f4febd5fd24aa382e872921a4742dd57
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD3 10052 bytes