Malicious PDF — malware analysis report

Static analysis result for SHA-256 54869e8b1a9d1c24…

MALICIOUS

PDF

39.7 KB Created: 2020-08-15 01:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e9e774db0eb4a4a2de269c4c156c8a1 SHA-1: 1340fc29b6bebcf4348ac396c6ada5e11eb36dd5 SHA-256: 54869e8b1a9d1c244fcbddde7c77b1170f5b721a53e7a0282e4f9382b9b83642
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=adverbs+of+quantity+in+french+worksheets'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack pattern involves luring users through the initial link, which likely leads to further malicious content or phishing pages.

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=adverbs+of+quantity+in+french+worksheets
    • http://files.leannereimer.com/uploads/1/3/0/7/130739895/24b7c11.pdf
    • http://files.edinburghshiatsu.com/uploads/1/3/1/3/131383775/rujaru.pdf
    • http://files.bluemantaswimming.com/uploads/1/3/0/7/130739452/kegalemikivipuwisa.pdf
    • http://files.fcssummerreading.org/uploads/1/3/1/0/131070597/4930681.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/33520844361.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24501063531.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4840/files/70510239079.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/zisovawosenatofin.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3302/files/fisamarigab.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/calottery._com_winning_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/tojapitin.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/arduino_bluetooth_car_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/nolenafaxok.pdf
    • https://cdn.shopify.com/s/files/1/0439/4919/5419/files/cover_letter_sample_job_application.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/baptism_bible_study.pdf
    • https://cdn.shopify.com/s/files/1/0440/8881/9864/files/waec_elective_mathematics_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/gogosabefaburojo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/4006/files/carpal_tunnel_strengthening_exercises.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_off00005b58.bin
f25e3e123e50e84a5abb276e1a278355f673396205f37c1b63630d7d9a1dac3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B58 5648 bytes
font_01_sfnt_off00006ea0.bin
93185eccdaa57482bb902eb287a5530a96738aaa83dba889e777b75a86b13fa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA0 10448 bytes

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