Malicious PDF — malware analysis report

Static analysis result for SHA-256 1886e6e3e844e01f…

MALICIOUS

PDF

44.9 KB Created: 2020-08-20 18:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80fac56839da9f3d2d93311b4a007988 SHA-1: ee683fbad5d36564254e395136433e5671af6433 SHA-256: 1886e6e3e844e01f91d801f35f6018a00a0e1c040b27bb7371452fa5a9f493fa
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 a redirector service known to host malicious content. The document body, though obfuscated, contains the URL that triggers the redirection. This suggests a phishing or scam attempt designed to lead users to harmful websites.

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=vert+shock+week+4+pdf
    • http://files.houstoncountyartscouncil.org/uploads/1/3/0/7/130775806/68b910115.pdf
    • http://files.lyndziecherry.co/uploads/1/3/1/3/131379183/bonavigotidalatofuki.pdf
    • http://files.visualeyeslove.com/uploads/1/3/1/0/131069915/52fab.pdf
    • http://files.nhwinterseniorsoftball.org/uploads/1/3/1/4/131437919/tivivot_mejiv_pizifisu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/human_body_organs_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/housekeeping_basic_knowledge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0464/8859/files/73563272541.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/siguzorisen.pdf
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/africa_crossword_puzzle_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/ontario_small_claims_affidavit_of_service_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/25268302883.pdf
    • https://cdn.shopify.com/s/files/1/0446/1690/8963/files/amana_distinctions_stove_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/6629089888.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/13995666430.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/65208271037.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/63368116295.pdf
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/73263363638.pdf
    • https://cdn.shopify.com/s/files/1/0439/7613/0718/files/bandukwala_game_wala.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_off000071dc.bin
343f374d1bbc22bf5ba0cc03bd15c8334d583f3151545402a1d8ad14e53e1c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DC 5212 bytes
font_01_sfnt_off000083b4.bin
99e7d3801343d469dd67ace686984c289568d5594a0584e57a7b7375e2038f75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B4 10260 bytes

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