Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff79bfc9f37a942…

MALICIOUS

PDF

34.7 KB Created: 2020-08-23 21:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 076e85bb7511576110a88db1d18ffacb SHA-1: 827dd5ffb4168ea6cbbc03e9b785d6acd8644665 SHA-256: 5ff79bfc9f37a9424d8fd956055d38fd4fa69a6c6c64b7b149f9cb9236a98993
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The document body also contains numerous links to PDF files hosted on Shopify, likely part of a link farm to improve SEO for malicious content. While no scripts were extracted, the presence of embedded URLs and the heuristic firings strongly indicate a phishing or redirection attempt.

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.ru/pify?keyword=marvel+avengers+alliance+redux+2019
    • http://luvunu.nancyjmiller.net/uploads/1/3/2/7/132741555/78bf6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5679/0678/files/60755590688.pdf
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/golazabenofumirifug.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5524/files/40110148941.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/2015_nissan_sentra_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/45068051897.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/nidufakabirabiziw.pdf
    • https://cdn.shopify.com/s/files/1/0437/6929/9098/files/riporidasopuwaji.pdf
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/44397232549.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/61054910946.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/lodexisot.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.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_off00004902.bin
77c801a38952b608419ca24a9821adf49e505923e262ef8639ef30aed3f7ebfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x4902 5720 bytes
font_01_sfnt_off00005c9c.bin
52654caba2bbf331a32370096174e8fce485b4b7002704c2c960845f87851981
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9C 9888 bytes