Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f0d90166484c0d…

MALICIOUS

PDF

37.9 KB Created: 2020-08-19 12:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 730b031e373f0b5caf9fb319d9c03b0f SHA-1: 79c2b5dfb0e5339a8812f6558f0877d579b64472 SHA-256: 39f0d90166484c0dbd8b1106bbc60fbbf9dfd898d0b6703b642f0d2f6fd4256e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. Another critical heuristic identified a large PDF link farm, with many links pointing to Shopify domains. The presence of these links suggests an attempt to manipulate search engine results or to distribute further malicious content. No scripts were extracted, and the document body was heavily obfuscated.

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=punctuation+comma+exercises+pdf
    • http://files.fosube.com/uploads/1/3/0/7/130740573/fudunaw.pdf
    • http://files.newlifenewbern.com/uploads/1/3/1/1/131163705/tafigevegozux-tasawoziw-xuwinugub-tafasow.pdf
    • https://cdn.shopify.com/s/files/1/0432/6139/5102/files/tuzodonaburozux.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/lotuxiluluni.pdf
    • https://cdn.shopify.com/s/files/1/0432/5802/0004/files/fishing_report_michigan.pdf
    • https://cdn.shopify.com/s/files/1/0433/9082/8705/files/75934717382.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44758106853.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/polasisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/addison_wesley_science_10_textbook_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/4794/2294/files/agatha_christie_and_then_there_were_none_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/kinimerugexanumi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/higher_mathematics_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/latupenukotagotawuvujuzel.pdf
    • https://cdn.shopify.com/s/files/1/0439/0413/9416/files/51693615967.pdf
    • https://cdn.shopify.com/s/files/1/0445/3846/2372/files/minecraft_maps_1._7._10.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_off000055b5.bin
81b8f8af40b2c08cc33575c2b3141bb5b487fccca82cb37c7468333f18089d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B5 5336 bytes
font_01_sfnt_off000067be.bin
44ae303ba7d52e27c8b2fdffd2cea606d86cb8bd493051be1420c551084bc463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BE 10372 bytes

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