Malicious PDF — malware analysis report

Static analysis result for SHA-256 182aacbd65516da3…

MALICIOUS

PDF

40.9 KB Created: 2020-08-10 21:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5279afb0c8d58fae50fc3750306aba56 SHA-1: cc14f5b872143e74a4d065be933db99bf39e1137 SHA-256: 182aacbd65516da31de96cb3b45deda033fae3a8bdf78514bbb3dba1f992a5a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=entrepreneurship+development+notes+pdf', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

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=entrepreneurship+development+notes+pdf
    • http://files.millantiques.com/uploads/1/3/1/4/131406435/5903267.pdf
    • http://files.lightsoutbaltimore.org/uploads/1/3/1/0/131070718/1149199.pdf
    • http://files.emporiabasketball.com/uploads/1/3/1/4/131437724/galumazu.pdf
    • http://pemonu.talismanhousepublishers.com/uploads/1/3/1/4/131407406/pufukufip.pdf
    • http://wuwobe.walnutstreetjuniorschool.com/uploads/1/3/1/8/131856318/2873593.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7852/4832/files/third_conditional_inversion_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/11374553041.pdf
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/paretologic_pc_health_advisor.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/insulin_aspart_davis_drug_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0504/files/92886054825.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/25548477658.pdf
    • https://cdn.shopify.com/s/files/1/0429/8522/6393/files/janabekusukuvato.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/raider_of_the_treasure_trove_poem.pdf
    • https://cdn.shopify.com/s/files/1/0437/3548/2517/files/a_year_with_my_camera_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/63633695380.pdf
    • https://cdn.shopify.com/s/files/1/0431/4238/1725/files/hilti_dx_a41_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000622f.bin
a2145e6212238c2772da3ff2ae53d1e5474e1399b3f63e5581a0aec2f80ecae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622F 5088 bytes
font_01_sfnt_off00007356.bin
9eea0f8a366e8b4d61c53d4b37ce3bf3664c3f7fdc047d4b5b6650531254af59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7356 10256 bytes

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