Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ede261ed44c8d96…

MALICIOUS

PDF

48.4 KB Created: 2020-08-19 22:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b208e8fb0e4927f57d441730e8ebb2a2 SHA-1: 149b2030283ec247ecf2e9537074d9bb0737eeb2 SHA-256: 9ede261ed44c8d96a9e30047c3c98f0f7f43ef3dd57326b71b84e356d5b488e4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=apne+tv+app'. This indicates a phishing or scam attempt, likely to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=apne+tv+app
    • http://files.mygentlebeginnings.com/uploads/1/3/2/6/132681456/7cd16a1eba.pdf
    • http://files.strategicshift.net/uploads/1/3/1/8/131856498/nazitiv.pdf
    • http://files.nonohairremoval202.greatwebsitebuilder.com/uploads/1/3/0/7/130775917/117098.pdf
    • http://files.emilystillings.com/uploads/1/3/1/3/131398008/20959.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/depopadufu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/estimation_costing_and_valuation_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4563/3693/files/cbr_test_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/biliki.pdf
    • https://cdn.shopify.com/s/files/1/0434/3136/2725/files/path_environment_variable.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/10929308711.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/71343441046.pdf
    • https://cdn.shopify.com/s/files/1/0437/7133/0712/files/third_grade_reading_comprehension_passages_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/c_vector_subset.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/canary_bird_breeding.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/litonilaxajijax.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_off000079b4.bin
fb092ec58cf6d669b5a56e68cdea13e1c146ea12429df8742d822df79db05b39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B4 4556 bytes
font_01_sfnt_off0000894b.bin
08089a431329238d90f0a51b7d6033b19e317e42fbf75c86b0278b15dc7eacc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x894B 13956 bytes

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