Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc72996704a6417…

MALICIOUS

PDF

86.9 KB Created: 2020-09-11 02:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4096a958182faa61fcb6ed1dd16872e SHA-1: 62a5a246d2cb1d39e3889d65757a152614906147 SHA-256: 5fc72996704a6417425d1d063844f6699aaffa9b6bfb483cf9ffa546814940e0
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm hosted on Shopify, but one critical link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector. This suggests a phishing or scam attempt, likely using a lure related to 'android studio kotlin tutorial for beginners' to entice clicks.

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/wix?keyword=android+studio+kotlin+tutorial+for+beginners
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/bodbot_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4693/files/60904747993.pdf
    • https://cdn.shopify.com/s/files/1/0462/8378/4352/files/use_of_pronouns_in_formal_writing.pdf
    • https://cdn.shopify.com/s/files/1/0440/0896/4246/files/20018746260.pdf
    • https://cdn.shopify.com/s/files/1/0466/8460/2532/files/4125115859.pdf
    • https://cdn.shopify.com/s/files/1/0432/7584/5792/files/gds_online_form_2019_sarkari_result.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7730/files/dorof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/xifosaniwabimoxabejol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/engineering_job_aptitude_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/7_point_container_inspection.pdf
    • https://cdn.shopify.com/s/files/1/0436/0486/9277/files/lafisufobatotutirukalabag.pdf
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/10272491692.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/laws_of_motion_worksheet_middle_scho.pdf
    • https://cdn.shopify.com/s/files/1/0465/2456/3614/files/tovekuxalosag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/limiting_adjectives_grade_3_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1579/7916/files/dudutut.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcb2.bin
d5e4017e6c5bba194153281b475fa8e50a3e6e056c6371ecc1cda62d7c1e8c98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 5152 bytes
font_01_sfnt_off00010e44.bin
ea994d1e91293ab6302feb7d003851dd6e70fb75102cd22b9de22804bf70eee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E44 15832 bytes
font_02_sfnt_off00013fe2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE2 4324 bytes

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