Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f4171ff34687ef…

MALICIOUS

PDF

50.1 KB Created: 2020-08-28 05:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f72b60cccc1f79e7973a392d65cbe87 SHA-1: 06c5d41b47cd46f421b99923c9d1bcafbe084fe3 SHA-256: 10f4171ff34687ef57a5b5e21b0843f268d86d31a5129f7e7133c3ac38c9eee8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. It also exhibits a PDF link farm pattern, with numerous links to external PDFs hosted on Shopify. The document body, though heavily obfuscated, contains the primary malicious URL and references to other benign-looking PDF links, suggesting a lure to a malicious site disguised as a collection of documents. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=2nd+edition+d
    • http://files.pamelafletcher.com/uploads/1/3/1/4/131438056/6f619015d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/72074876441.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/94748155338.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5592/files/29861410706.pdf
    • https://cdn.shopify.com/s/files/1/0460/4172/7140/files/tilubidejoxebelofek.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2024/files/apple_configurator_2_without_app_store.pdf
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/tugagosunabana.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8763/files/71372602457.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6138/files/64064078096.pdf
    • https://cdn.shopify.com/s/files/1/0437/7565/6094/files/zokinu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/download_chrome_from_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0433/6694/0828/files/battleships_movie_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/lawozilawusavuwerekup.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/lesolovitorugabotew.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c57.bin
27038f7d2865088720ed715d93d2cf76101db3fe1a3d6f1e0f1135e32e8d79a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C57 4128 bytes
font_01_sfnt_off00006a56.bin
1182553af4e4e1d4f08dc5c53a41ba3cf7bb24133579164eb638a84c8e765df2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A56 2012 bytes
font_02_sfnt_off00007389.bin
ced8df3f75e9b62fffc51d8f8dca91cd9090401ee258146b1a3679c2f1696596		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7389 10584 bytes
font_03_sfnt_off000097e4.bin
b7d3fe0f0eed6e60c79e5026c6c3c7babf05c9d359090ed5b12ebb11be5d450a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97E4 16120 bytes
font_04_sfnt_off0000acd2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACD2 4324 bytes

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