Malicious PDF — malware analysis report

Static analysis result for SHA-256 1151d279903567e6…

MALICIOUS

PDF

45.2 KB Created: 2020-08-30 16:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e115fd238918a82aa8dc6e60342f192 SHA-1: 20e1ada51ffda99fae6b1b7130c930629f0ed8ed SHA-256: 1151d279903567e641896f8c262cc9696a5be0497b913d5bb797da053f9ea192
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external links, indicating a link farm or redirection attempt. The presence of a 'download button' lure further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=power+points+usa+swimming
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_0d679de417aa405f91780757c8d963ec.pdf
    • https://static.usrfiles.com/ugd/a31856_62811dfa99e04a49a309fe093158275d.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_e3b0c8ccdac0450e98f5106d75ea5ce3.pdf
    • https://static.usrfiles.com/ugd/b8c837_192c92c0d559484dac893d6c930670a3.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/gerofejezow.pdf
    • https://cdn.shopify.com/s/files/1/0463/1825/6285/files/zebisa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/vujeposodaderigolanuveb.pdf
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/88666466802.pdf
    • https://static.usrfiles.com/ugd/314c35_81e4549a6d794c99b5081b93d7e1bcab.pdf
    • https://static.usrfiles.com/ugd/0c41e7_67958f2fa6ac41f986a7d0d3faa36791.pdf
    • https://static.usrfiles.com/ugd/bae363_3a084e002102427c8189162c8293d799.pdf
    • https://static.usrfiles.com/ugd/36f25b_af0615dcf9ec44aebb09fc69a6da2ebe.pdf
    • https://static.usrfiles.com/ugd/837d34_a8408c7bfa484dda90215f99cc5e6705.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdacf10884604719b5fe5f97e6c3203c.pdf
    • https://static.usrfiles.com/ugd/a4e402_51a7689e3a544c81a31d2544b10860ee.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_off00007342.bin
22c6d4f831abb3fd05b9e58062647c987187d9178b1037043acfbde97d440698		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7342 5200 bytes
font_01_sfnt_off000084e7.bin
471e64fa0780f12c63972bb4bed46dea18000f2a57bb5c0de8792c71f8fe76f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E7 10384 bytes

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