Malicious PDF — malware analysis report

Static analysis result for SHA-256 65dd03d39f05f9ab…

MALICIOUS

PDF

47.7 KB Created: 2020-09-01 07:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b90f517db9430fd74a0676da02ef0552 SHA-1: 788be0a8aea111f5a168d4c877cc50922795fc11 SHA-256: 65dd03d39f05f9ab02d87a3b365c012cdcbec136cb0906dd37cfc90c0e621c93
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 heavily obfuscated, contains a URL that appears to be part of this link farm. This suggests an attempt to direct 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.cc/pify?keyword=blenheim+high+school+6th+form
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b56239_72798eeb6556471ca540b1783459c2e3.pdf
    • https://static.usrfiles.com/ugd/79e0dc_401f2555bfbe4dc89ea8ee2ef0da6af2.pdf
    • https://static.usrfiles.com/ugd/b8c837_a36ea42998094656aa0a9fa596767647.pdf
    • https://static.usrfiles.com/ugd/bf0735_c53c917a8eb9493e8a350f26b09d8168.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6284/files/aminoacidos_bioquimica.pdf
    • https://cdn.shopify.com/s/files/1/0462/2440/8730/files/2018_afl_season_fixture.pdf
    • https://cdn.shopify.com/s/files/1/0430/5567/7591/files/rodupakenajegovufutadikes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/introduction_to_classical_mechanics_david_morin.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/33724153289.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/2001_ford_f150_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/56117553276.pdf
    • https://cdn.shopify.com/s/files/1/0463/3388/6626/files/puntos_que_dividen_segmentos.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b2801f4ef954e06afde1a49b0f6e3d3.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_b1ea697b776248bf8cdd6307ee99960e.pdf
    • https://static.usrfiles.com/ugd/576447_68adc395ebd7458e905abacde1a36cbb.pdf
    • https://static.usrfiles.com/ugd/aec2ea_4daab904bf7b479ebd3f632966679c9a.pdf
    • https://static.usrfiles.com/ugd/b9801a_dd76ef8c3c234b4a8d54d8a00177bc24.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000675f.bin
756c99c8ae9b5fec171d751102f0cf4e64ca39a871fc9b53fee3ca530b1cd80b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675F 5288 bytes
font_01_sfnt_off0000793d.bin
72b7abef2947181a60da8f79e91d6701dce2c4cf11dfec4ca65be95c2614f4b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793D 10024 bytes
font_02_sfnt_off00009bd5.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD5 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.