Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b8a2126b1df6b5…

MALICIOUS

PDF

44.4 KB Created: 2020-08-02 14:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c380cd933339ca117cddb990c625582d SHA-1: e54925a845132c625a848c6bb5a8544be93192cc SHA-256: 02b8a2126b1df6b51f8203c5825adc8ea2b8f485d4c6d458796feaae4deb66d2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though partially garbled, includes a URL that is also present in the heuristics, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the presence of many external links points towards an attempt to drive traffic to potentially harmful sites.

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=how+to+terminate+program+in+java
    • http://files.liveslivedwithlaw.net/uploads/1/3/0/7/130775277/9262953.pdf
    • http://files.powerofplaywilmington.com/uploads/1/3/2/7/132712234/bunefekonibafedapob.pdf
    • http://files.foxstoneexteriors.ca/uploads/1/3/0/8/130873997/2cacc2cd.pdf
    • http://files.ieleaders.net/uploads/1/3/0/7/130776718/45c35ab516bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/jaxopososozikexoginuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/nesasifovexowiludovof.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8285/files/61470509322.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/41045265103.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/18722688213.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/41240334292.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/gmat_questions_and_answers_2016.pdf
    • https://cdn.shopify.com/s/files/1/0433/4970/4854/files/70595142707.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/6335700640.pdf
    • https://cdn.shopify.com/s/files/1/0432/4275/0114/files/91043953131.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65233410578.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/jamigo.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_off00006f08.bin
d1ed887d440c2ba7e9989c11873b752d0728270102fd0175fe230c336cdac2b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F08 5120 bytes
font_01_sfnt_off00008073.bin
cdfc5449f5b354f409196590af0bbf90520a56539d569bddb837f51c75f520e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8073 10604 bytes