Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4858975a993522…

MALICIOUS

PDF

45.2 KB Created: 2020-10-07 06:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0a84833e25069b700f41028d2b036248 SHA-1: 97f95a697b54a83aff6d0a83202cd93b08bd5104 SHA-256: 5f4858975a9935224fa0544fd4a31d7573f728a1a7e74d7a805b8e45fc898794
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed for redirection.

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://ggtraff.ru/pify?keyword=clean+cut+paper+towel+dispenser In PDF document text
    • http://files.peterobot.com/uploads/1/3/2/8/132815812/8826931.pdfIn PDF document text
    • https://site-1038779.mozfiles.com/files/1038779/96227766696.pdfIn PDF document text
    • https://site-1038882.mozfiles.com/files/1038882/gitaxizuribub.pdfIn PDF document text
    • https://site-1041615.mozfiles.com/files/1041615/bavamamuzem.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/raxojesurugebesalar.pdfIn PDF document text
    • https://site-1038539.mozfiles.com/files/1038539/14620848615.pdfIn PDF document text
    • http://togewu.jclvision.com/uploads/1/3/1/6/131637719/04b1e923c6fc6.pdfIn PDF document text
    • http://files.sollygutmanscratchboardart.com/uploads/1/3/1/8/131871980/e6bfad8fc.pdfIn PDF document text
    • http://files.evcmarketing.com/uploads/1/3/0/9/130969985/2809475.pdfIn PDF document text
    • http://files.eqnon.com/uploads/1/3/0/7/130775729/4918421.pdfIn PDF document text
    • http://files.advantagedroneproductions.com/uploads/1/3/0/9/130969110/6b9fb3717b99c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/sifagunitagavur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6069/0589/files/63950555492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1042/3456/files/levisubiwegurop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/vemoradaxudururirebod.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C1 5064 bytes
SHA-256: e8bb00d8cf571f1ef488d20814909b80eba2cae7690ad56363fdb264b0bde952
font_01_sfnt_off00007712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7712 10028 bytes
SHA-256: ae36b984b4cfb93d3bb7d8a6524065343c52ed1cb7eee564531d85817768bafd
font_02_sfnt_off0000995c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x995C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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