Malicious PDF — malware analysis report

Static analysis result for SHA-256 616dada1efd2b3e3…

MALICIOUS

PDF

40.6 KB Created: 2020-08-30 15:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 634fc6178739cccef76304ddc945ba28 SHA-1: 56f8edad7b2b54c8e318b095d8be7f25c16b8fd9 SHA-256: 616dada1efd2b3e36146eff10237aa9ab4b6b27ed8c4d99ee91864e29462d1f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the family is undetermined.

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/wix?keyword=wow+4.+3.+4+repack
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_26b7c7b173fe41feac66e8bff6e4ed9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4aa6b52ad8c4f63ba4bd253b9a4b068.pdf
    • https://static.usrfiles.com/ugd/79e0dc_0bd9d2b082794a12b93e3931b00e0905.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/98227022436.pdf
    • https://cdn.shopify.com/s/files/1/0463/1271/8498/files/information_report_examples_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0434/1035/8423/files/colorchecker_passport_software.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78682713185.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/5341114321.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/81978113903.pdf
    • https://cdn.shopify.com/s/files/1/0463/5557/9042/files/pathfinder_blood_of_fiends.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mogapusezonoxifetomo.pdf
    • https://static.usrfiles.com/ugd/b8c837_39f0f66d1d6e4fa6876cafb002f957c2.pdf
    • https://static.usrfiles.com/ugd/b77b08_363ffc18ff54442eb305c92ce8054fbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f6a4ec01ce2412d9d447d9b7fc740d1.pdf
    • https://static.usrfiles.com/ugd/5be868_dfc54593b3f84fe081378e03a8e1d439.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_off0000609f.bin
60010a3a5424e60a028e7557b02e509f019ad633728b6ec23179cbee47764d78
pdf-font-stream PDF embedded font (sfnt) at offset 0x609F 5168 bytes
font_01_sfnt_off0000726d.bin
e98e95fa27dafd236aee1a4c4af3431ef1e7fb440600826f4497694481de1a1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x726D 10388 bytes