Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f7f137300b73f3…

MALICIOUS

PDF

46.4 KB Created: 2020-08-18 18:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37e336c08b2c57246818e3c17e02f451 SHA-1: 1ca31376cb0ab166dbcbddce5bad69d4d14b55eb SHA-256: e1f7f137300b73f3e1dcbfee68dcfce7e7403f15b761d5d6edff8180d0b37d43
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text fragments and a URL that align with the malicious redirector. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing malicious content. The primary malicious URL identified is https://ttraff.cc/pify?keyword=balance+sheet+equity+calculator, which is used to redirect users to further malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=balance+sheet+equity+calculator
    • http://files.jerseyyachting.co.uk/uploads/1/3/1/4/131406935/josubosuxuwutu_balopijew_zulapin.pdf
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/38976850701.pdf
    • https://cdn.shopify.com/s/files/1/0437/4321/5767/files/windows_7_enterprise_product_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/nabapaguwebel.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7223/files/order_of_adjectives_worksheets_for_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/excel_data_analysis_tool.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/rutowu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/tejaxitifebirowikefuvu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/blagues_en_francais.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/petsafe_wireless_pet_containment_system_manual.pdf
    • https://cdn.shopify.com/s/files/1/0445/7899/6383/files/breakthrough_prayers_for_a_job.pdf
    • https://cdn.shopify.com/s/files/1/0436/9504/6824/files/15163341232.pdf
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/3371703179.pdf
    • https://cdn.shopify.com/s/files/1/0432/5392/4004/files/water_jet_machining_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5857/files/list_of_similar_words_in_english.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_off00007826.bin
966f9e25d0cef7cc4f9ed104bd37132cf830cde200653810f168dc3984364700		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7826 5164 bytes
font_01_sfnt_off000089b2.bin
88971f2f6a11ca65ac02dafee43df2679d1edc1d20410d4c3e3e33493687ee36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B2 10296 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.