Malicious PDF — malware analysis report

Static analysis result for SHA-256 9225cab4ccf2624e…

MALICIOUS

PDF

39.4 KB Created: 2020-08-20 22:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90b80a9b7d592ea61d49efe73f4ab14a SHA-1: edc287cf8368eaaf04194f5b7976f60a7a94c6f4 SHA-256: 9225cab4ccf2624e80787b79496d86d7edfe1adda256b9eecfcce07196f42f1a
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=beira+alta+menu+pdf', is flagged as a malicious redirector. The presence of numerous links, including one leading to known malicious infrastructure, strongly suggests an attempt to lure users to malicious sites. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link-based redirection.

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=beira+alta+menu+pdf
    • http://files.aaaction.org/uploads/1/3/2/7/132740541/dimigi-vasimezilan.pdf
    • http://files.gameplayer.dk/uploads/1/3/1/4/131411688/1800786.pdf
    • https://cdn.shopify.com/s/files/1/0465/2865/9614/files/samavotamapinoli.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7626/files/widasogiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/majojatugogimetozuxotubel.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/basic_english_grammar_with_urdu_translation.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/business_plan_budget_sample.pdf
    • https://cdn.shopify.com/s/files/1/0436/4586/2041/files/77343879432.pdf
    • https://cdn.shopify.com/s/files/1/0431/2190/1729/files/admin_panel_template_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/wepabuvazujebopufopexo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/67543233667.pdf
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/guardian_transmitter_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3062/files/62882029299.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/87519954184.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_off00005e44.bin
e0f76fc7d8b5777f9e5acaf48c8982c11cfd335e28b8b62e2d2c21bb913f60b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E44 5056 bytes
font_01_sfnt_off00006f57.bin
a3ada74e84a15ee5bf08d14ff9f05247603c964fedd55f99641cd6c1ccdaa279		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F57 9804 bytes

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