Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1fd1b7fc0b44ae4…

MALICIOUS

PDF

39.2 KB Created: 2020-08-23 04:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7643ee611b3a8b6a7ac071598f78c18a SHA-1: 96cb7167789ec59e83f425723e4bade19f35a71a SHA-256: e1fd1b7fc0b44ae4afef0b60e08c05e59cab6d38a1b93ead2cc662273db7b7b5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One of the primary URLs, 'https://ttraff.ru/pify?keyword=rationalized+form+definition', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF files, suggesting a coordinated effort to distribute malicious content. No scripts were extracted, but the heuristic firings strongly indicate a malicious redirection scheme.

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=rationalized+form+definition
    • http://files.johnstotalentertainment.com/uploads/1/3/1/6/131637137/zitebis_ziviweranodipad_bafomub.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/74852241764.pdf
    • https://cdn.shopify.com/s/files/1/0462/0989/2505/files/zapokitif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/pdf_edit_pages_windows.pdf
    • https://cdn.shopify.com/s/files/1/0452/6263/5168/files/52691815765.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/the_casebook_of_sherlock_holmes_audiobook.pdf
    • https://cdn.shopify.com/s/files/1/0435/2504/6431/files/letters_and_sounds_phase_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/shutterstock_image_er_without_watermark_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/5758/6071/files/18498788861.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/26047478140.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_off000048f9.bin
2b51f57ab45513d9a1a929348e6411b5de318ab9a481deec1e3924ff8c6f4fcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48F9 4932 bytes
font_01_sfnt_off000059b4.bin
95a6e5ccd6d01f731f6bb7dc59cb9373a9ac955207518e8d812f531f171a292b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B4 9752 bytes
font_02_sfnt_off00007b39.bin
84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B39 16060 bytes

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