Malicious PDF — malware analysis report

Static analysis result for SHA-256 515ed7093be1030d…

MALICIOUS

PDF

53.8 KB Created: 2020-08-03 09:39:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79ebfe5bc74c9921043ab1557bfe9f48 SHA-1: cd20abe93d5238accaae3467aae1146b5e14ffe3 SHA-256: 515ed7093be1030dd5a2fdd95acd1e48e94dc752913bcfc3b9d801e01a716045
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, with one heuristic identifying it as a PDF SEO link farm and another flagging a link to known malicious redirector infrastructure. The document body is heavily obfuscated but contains the URL 'https://ttraff.ru/pify?keyword=late+night+interbridge', which is also flagged as malicious. This suggests the primary purpose is to manipulate search engine results or redirect users to 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.ru/pify?keyword=late+night+interbridge
    • http://files.thecakecottagemurrieta.com/uploads/1/3/0/7/130775537/velikafuroluvad.pdf
    • http://files.lebaneseaustralianfriendship.com/uploads/1/3/1/3/131398424/92a29b.pdf
    • http://files.weseeyoujohn.org/uploads/1/3/0/9/130969915/4943029.pdf
    • http://files.mesahhealingandreadings.com/uploads/1/3/0/9/130969982/98f44929b.pdf
    • https://cdn.shopify.com/s/files/1/0429/1765/8780/files/zixogotarig.pdf
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/31287503545.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/40132575759.pdf
    • https://cdn.shopify.com/s/files/1/0440/1892/5726/files/telekejowexibas.pdf
    • https://cdn.shopify.com/s/files/1/0437/8961/5266/files/vutunifuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mabiwabupo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/36440623293.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/51227828425.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/17885629208.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5750/files/11737201457.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/pdf_file_editor_for_android.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_off0000956e.bin
c59c66d16767eb7f99134eed1ed1901e959bd3c891cd1a7ab11bd68303a8e2ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x956E 4960 bytes
font_01_sfnt_off0000a647.bin
9ef7b0497ca2b43fc1c1685f903f212238bb0870329007ff62b00b6c358e1508		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA647 10704 bytes

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