Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d691b3b940bc6f…

MALICIOUS

PDF

34.6 KB Created: 2020-08-12 16:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a26392a7cd63b11423db3ddd36b0373 SHA-1: 5239f7add634bb0b79b58848571d4e96da8ab8c9 SHA-256: d6d691b3b940bc6fff63dbf9539cabfa50c7c0c10e42a2ed2345fb8104c222b7
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains this URL, presented as a free download lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting PDF files.

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=learn+english+with+pictures+pdf+free+download
    • http://files.partydecorationsbyteresa.com/uploads/1/3/0/7/130775698/lekalu.pdf
    • http://files.tarabarkerfineart.com/uploads/1/3/0/8/130813731/gufen.pdf
    • http://files.nrsainc.com/uploads/1/3/2/6/132681448/8515698.pdf
    • https://cdn.shopify.com/s/files/1/0439/3077/9816/files/advanced_vocabulary_words.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/temov.pdf
    • https://cdn.shopify.com/s/files/1/0433/6992/2714/files/barivamuwut.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/annamacharya_keerthanalu_telugu_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/23425860669.pdf
    • https://cdn.shopify.com/s/files/1/0441/0186/1528/files/9410195423.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/nedeberana.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5548/files/true_love_by_dove_cameron.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/agenda_web_reading_comprehension.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3650/files/zorulokavoduvuwopufumiwa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/valobitumimomujugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63491738983.pdf
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/wakakulogemo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8180/files/systemic_lupus_erythematosus.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_off000049da.bin
398aa778352124897710c38fe88cfb1731e62d6449270781e365f0c984cf7c13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49DA 5448 bytes
font_01_sfnt_off00005c71.bin
abbce838993e2c5643ab93ab4057caef5f2b9fa8423763c4704f9fd8bd43996b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C71 9656 bytes

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