Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce7e5b89933d769…

MALICIOUS

PDF

53.3 KB Created: 2020-08-16 18:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad54c3ba22486b57731b0d2b4ca2a37d SHA-1: 2bbe39021f601a43d07bfc5752e60c818f8c8d05 SHA-256: bce7e5b89933d7699c0e33f2fd483d813ce097564e1bb48e4831e99385c8638a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=eclipse+code+formatter+javascript'. The document body, though heavily obfuscated, also contains this URL and references to other PDF files, suggesting a link farm or redirection scheme designed to lead users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=eclipse+code+formatter+javascript
    • http://files.1stpresbyterianiselin.org/uploads/1/3/1/6/131606819/girojogaju.pdf
    • http://files.churchdiva.shop/uploads/1/3/2/7/132712490/wunawukigesesojifar.pdf
    • http://wafolob.bakercreeklavenderfarm.com/uploads/1/3/1/4/131406149/3031312.pdf
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/minecraft_server_with_hamachi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7173/1880/files/42000742796.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9685/files/72420028252.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/fanipuvega.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/31116487370.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/sinusitis_guidelines_2017.pdf
    • https://cdn.shopify.com/s/files/1/0429/1906/7815/files/yeh_hai_aashiqui_song_bestwap.pdf
    • https://cdn.shopify.com/s/files/1/0429/2342/5955/files/sensors_and_actuators_in_automotive_electronics.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/nerivepijizupanovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/nugotiketubevowakafetam.pdf
    • https://cdn.shopify.com/s/files/1/0435/8415/9903/files/what_is_nexus_vst.pdf
    • https://cdn.shopify.com/s/files/1/0431/3828/5725/files/paulo_coelho_aleph_francais.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_off00006c84.bin
1bded641b866e6b471d14293cb08e59621d03151e09b62030aae9009bdadb1c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C84 7504 bytes
font_01_sfnt_off000085c5.bin
3d8fdb979634c900a4b8ba74e40c42619d7a7e9fdad2f396f44434959f0fe33a
pdf-font-stream PDF embedded font (sfnt) at offset 0x85C5 5392 bytes
font_02_sfnt_off0000980c.bin
6ae8ab5bc29eb1f95c8b4ff3f396b5701be78ed147ae5e65d1ffb0663ec1b12b
pdf-font-stream PDF embedded font (sfnt) at offset 0x980C 15388 bytes