Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe9abe7df7c1218…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 16:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 435d9a7214fa2071dc5c9877b811233c SHA-1: 99813f824fdc1d97ea75c41dd7bed87d0b96aff7 SHA-256: cbe9abe7df7c12184b566a0d74a9ca195a0db4132b8c2b8c65fdb1fed14555ed
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. This URL is part of a link farm designed to drive traffic to various external PDFs, many hosted on Shopify. The document body, though heavily corrupted, contains the same search query as the redirector URL, indicating a likely SEO spam or phishing lure for free PDF downloads. No scripts were extracted from this sample.

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=libros+de+catequesis+para+ni%25C3%25B1os+pdf+gratis
    • http://files.teatimewithnaomi.org/uploads/1/3/1/6/131606222/74f872dc.pdf
    • http://nekafumuv.wildrootsyoga.com/uploads/1/3/0/9/130969744/9513113.pdf
    • http://files.freshenitup.org/uploads/1/3/1/4/131438423/loxes_fafupepob_pamedovis_wekuveraf.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/23878809326.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/desosomojakiridipusina.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/41656660493.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/uninstall_flash_player_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/8155/4325/files/blender_2._8_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/94574374979.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/midas_m32_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/java_ap_computer_science_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006128.bin
f650b4a44df42c18d65180b56599fc8deb9e79f9de1c1bcb08685c392ec19646		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6128 5592 bytes
font_01_sfnt_off000073e3.bin
960b348dfa2276281c6107aa4442c82763910e74f6fec261fef43182a16f9070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E3 11436 bytes
font_02_sfnt_off000098dd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98DD 4324 bytes

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