Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad550f3bf2af0b6…

MALICIOUS

PDF

42.9 KB Created: 2020-08-26 16:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c32c3d5fe11a72a43c14de29cfd47c58 SHA-1: 1a5408905f364c50f1dcfad3d699d554c6f425ae SHA-256: 4ad550f3bf2af0b6986879d86083c759c6a3feb6ec1fabe6fa58593640344271
150 Risk Score

Malware Insights

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

This PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=dump+meals+lady, which likely serves as a gateway to further malicious content. The document also contains numerous other links hosted on cdn.shopify.com and other domains, forming a link farm, which is a common tactic for SEO poisoning or distributing malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=dump+meals+lady
    • http://files.jovaunholmes.com/uploads/1/3/0/8/130873973/818c81.pdf
    • http://retod.federicabruni.com/uploads/1/3/0/7/130776262/4668240.pdf
    • http://xinakil.oldhatflytying.com/uploads/1/3/2/3/132302936/9d4a324d4d9b.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3434/files/73938257341.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/35413890335.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/design_and_fabrication_of_candle_making_machine.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2634/files/mexican_fiesta_invitations_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/alkaloids_journal.pdf
    • https://cdn.shopify.com/s/files/1/0440/4540/2277/files/refukad.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1056/files/3780227268.pdf
    • https://cdn.shopify.com/s/files/1/0438/2271/0941/files/diary_of_jane_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/1712/5544/files/cookie_sheet_cupboard_organizer.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/kavebepimezobolenaxazixa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9109/9799/files/wixakumod.pdf
    • https://cdn.shopify.com/s/files/1/0452/3986/1408/files/laissez_faire_leadership_style.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8506/files/physical_oceanography_textbook.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_off00006b3c.bin
430f9b793360d8e060581e3e0b46d2d4a67b1825c6c569fba1254c2602862399
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3C 5108 bytes
font_01_sfnt_off00007c97.bin
549875bb31ae789f00e535121f034bc117fde01dbac22124f22347d777999895
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C97 10120 bytes