Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8bd4a219a9d444f…

MALICIOUS

PDF

34.8 KB Created: 2020-08-23 10:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f224d73ab2894d1dfde0af32373d6b6 SHA-1: 358c9bdea807ad99a9bb74f65cb0fc9d3569f49d SHA-256: c8bd4a219a9d444f48c0cfed41d753e580e9739d91164a564b4e8b1fa5183c64
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to sheet music and the malicious URL, suggesting a lure for users seeking free music. The primary malicious IOC is the redirector URL, which likely leads to further 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.cc/pify?keyword=surfin+usa+piano+sheet+music+free
    • http://wubedo.altoonaenglishclub.com/uploads/1/3/0/7/130738629/2517851.pdf
    • http://lumodu.kikapoosphynx.com/uploads/1/3/2/7/132710621/2188807.pdf
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/away_in_a_manger_violin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/avoir_present_tense_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/2277/6480/files/447386622.pdf
    • https://cdn.shopify.com/s/files/1/0430/6246/0577/files/xilubibelisavetekesuxotop.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/calendario_mundial_rusia_2020_hora_chile.pdf
    • https://cdn.shopify.com/s/files/1/0433/5307/9963/files/zezonagegejafaxamo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/sainik_school_balachadi_admission_form_2019-_20.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/43396759907.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6384/files/android_studio_room_multiple_tables.pdf
    • https://cdn.shopify.com/s/files/1/0432/2610/3971/files/40775397320.pdf
    • https://cdn.shopify.com/s/files/1/0439/0689/1931/files/ain_t_no_sunshine_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/94649916842.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/mapa_de_puerto_rico_con_sus_pueblos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/outlook_remove_duplicate_emails.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_off000049a2.bin
7531693343f1670c050bd9afb9760408cd3a0605f4971dc5bd83289adfc5d6ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49A2 5328 bytes
font_01_sfnt_off00005b8d.bin
b1b24b1a4f3974b7bb8dfb910238dc6adff417127f3b64f28d3d4240ce77ad6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8D 10188 bytes

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