Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f2b0491a598d7b…

MALICIOUS

PDF

39.3 KB Created: 2020-08-29 14:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0576e8c45e54b0d0d18d9bfbbc81e02 SHA-1: 7359bc0c47cfa16143550327865e5aa74b9892a4 SHA-256: 48f2b0491a598d7b0bda504035608c4a1c894e70fa56b798cd31aa3867e9ce88
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 pointing to 'https://ttraff.com/wix?keyword=present+past+future+tense+table+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. No scripts were extracted from this sample.

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.com/wix?keyword=present+past+future+tense+table+pdf
    • https://cdn.shopify.com/s/files/1/0432/1548/7133/files/51690899674.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/hal_dll_bsod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/53804769471.pdf
    • https://cdn.shopify.com/s/files/1/0429/6078/1475/files/69774990582.pdf
    • https://cdn.shopify.com/s/files/1/0462/6507/3818/files/free_christmas_music_quiz_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/nezasoku.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/rutomaverixugedemenuxita.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/vexojonekoguzof.pdf
    • https://static.usrfiles.com/ugd/b8c837_a68c19e79ac14cc0a1bd0bc883cb7970.pdf
    • https://static.usrfiles.com/ugd/b8c837_80d06a40ee0e4830a329fd06d61ebd6d.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/affirmative_negative_and_interrogative_sentences_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/jerovakalugo.pdf
    • https://cdn.shopify.com/s/files/1/0461/9380/3415/files/modern_times_charlie_chaplin_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/simple_present_tense_worksheet_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0452/5129/7440/files/fun_book_report_ideas_for_7th_grade.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_off00005c44.bin
b7571563a24f8d55e7b5c41cd66d4be69b9eeec4c81116603070d98e8749f31e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C44 5176 bytes
font_01_sfnt_off00006dda.bin
f2881883a4e2589ff7e38c314aa564000087d4ea6963e32b59c8615c82622022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDA 10060 bytes

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