Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6350ba8df32d1d…

MALICIOUS

PDF

41.2 KB Created: 2020-08-25 14:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94964b480f7ea603d0f16bbfedaed44e SHA-1: ee72494bd71df5d1bcb144b4e1c4c59805d88861 SHA-256: ee6350ba8df32d1d3bfa86a8e65b6d88786e5a5eeb4a362085c0aa23942be4a5
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=instagram++image+firefox'. Additionally, it features a link farm heuristic, indicating a large number of external links, with one prominent example being a PDF hosted on Shopify. The document body, though heavily obfuscated, also contains the malicious redirector URL and several benign-looking Shopify URLs, suggesting a lure to download or access content that ultimately leads to malicious infrastructure. The presence of a download button lure further supports the malicious intent.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=instagram++image+firefox
    • http://xovosozad.johndalexander.com/uploads/1/3/1/3/131378776/nusarewig_mapesuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/modern_chemistry_textbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0465/0962/1406/files/15744585308.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/whatsapp_gb_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/kerovigokunimuxofoge.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/vevagonud.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5108/files/ku_admission_2019_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/4092514135.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/96040267969.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/25669568164.pdf
    • https://cdn.shopify.com/s/files/1/0437/1555/9573/files/what_is_a_metaphor_for_love.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_off00005b88.bin
f161f2552d2982b0a5757e026f8096f4276eb4ebce2fb342f778fd0b2f7bfed9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B88 5060 bytes
font_01_sfnt_off00006ca0.bin
246569b5fd7226bd0ebf3c016de7ba0bf82e996896d660a08030b2af0a08efd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA0 1936 bytes
font_02_sfnt_off000075e0.bin
0a2bd23900e79722d9bb451257464b29192c1134285ff40db9ceab7cd2817748
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E0 9996 bytes