Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f387a6d90d7fe91…

MALICIOUS

PDF

39.7 KB Created: 2020-08-17 07:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba107f7e9e1fdf78348ca4c52e0548ff SHA-1: c0b290595179345e82a89f0214af2dc21061b053 SHA-256: 0f387a6d90d7fe91fb391c260f1c02c55637a914d033a215f3d525aafd992d21
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text referencing 'Baahubali 2 telugu movie 4k' and the malicious URL, suggesting a lure to a fake download or streaming site. The presence of numerous links to benign Shopify PDFs indicates a link farm strategy to improve SEO for the malicious redirector.

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.com/pify?keyword=baahubali+2+telugu+movie++4k
    • http://gosizanul.dominicaliving.com/uploads/1/3/2/6/132696117/2777fa9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8513/5014/files/berat.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6116/files/addition_facts_worksheets_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/swift_for_loop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6412/files/aptitude_test_questions_and_answers_for_bank_exams.pdf
    • https://cdn.shopify.com/s/files/1/0432/5736/4638/files/49061258174.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/samezu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/orari_cavourese.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/11507151528.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/american_flag_coloring_pages.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0328/files/fexifikusujegekoxubodil.pdf
    • https://cdn.shopify.com/s/files/1/0433/8787/9580/files/lajofemokobejusela.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/nunodatoput.pdf
    • https://cdn.shopify.com/s/files/1/0461/3698/3720/files/android_room_query_sum.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/rexujozut.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_off00004938.bin
83b8d2334e065647802288494c6107ab9b4654dbc5fa7a75535a709d253f0287		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4938 5360 bytes
font_01_sfnt_off00005b63.bin
a33aa92118734200d37eee70465635e002d6ea2f3d66113163e7cca4602195ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B63 6492 bytes
font_02_sfnt_off00006d58.bin
4726e87965158a00db072d8da60aa47ca5b0fde406a36c28f7d8e51545f48c39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D58 10180 bytes

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