Malicious PDF — malware analysis report

Static analysis result for SHA-256 130418629830909d…

MALICIOUS

PDF

63.9 KB Created: 2020-08-31 02:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 943d661c5d5ae2a71c3a73984b8892a4 SHA-1: c3fec4899fd5507caba2a7a2c209586cfe326a6d SHA-256: 130418629830909da72832a931c61eb43cda7faeb14f68428b9c0f14148303dd
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=general+microbiology+pdf', suggesting a lure to trick users into clicking on malicious links. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic to distribute malicious content.

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/wix?keyword=general+microbiology+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_5f33da28321c406381cb980a03448b05.pdf
    • https://static.usrfiles.com/ugd/b8c837_39e4fce23e094c38b95c59222cf2cbd7.pdf
    • https://static.usrfiles.com/ugd/769f78_85d96ed8083246f99a47f6206f731b96.pdf
    • https://static.usrfiles.com/ugd/26481d_00d0c99459bd469a8ef120f4e4d003db.pdf
    • https://static.usrfiles.com/ugd/078c79_48e8a499ed504ce9a7a64957297afe4e.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/zufepelidevovelur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/56015862117.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/napevokisakerodaderope.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofes.pdf
    • https://static.usrfiles.com/ugd/078c79_1c0de504d65c4ef4b62b9d400314b0cd.pdf
    • https://static.usrfiles.com/ugd/3bca44_19aaadf0cc0b4fe28ae4c233f53a9cb2.pdf
    • https://static.usrfiles.com/ugd/d55797_d0a955793d1b42d1b7f12cbfaa3def50.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000c5f9.bin
1d48020cc677b7ff133220c09e44f2a8c2c3755d44f7ee3123564adc754cad61		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC5F9 18684 bytes
font_00_sfnt_off00008ca4.bin
0e788da0790c8ff8631df255407880846a11b4197e6ff66c961c6b179d4dd61d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA4 5280 bytes
font_01_sfnt_off00009e77.bin
920d3f242230991319605d341aa7f345a7ecbab18141e8a2f332df23e825be20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E77 11656 bytes
font_03_sfnt_off0000e434.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE434 4324 bytes

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