Malicious PDF — malware analysis report

Static analysis result for SHA-256 1562079b2ad19099…

MALICIOUS

PDF

50.7 KB Created: 2020-09-03 19:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4bf002b1656eb2a5cadeb5826401051 SHA-1: 8da96740080379ded46a471aee24d334a6002e60 SHA-256: 1562079b2ad19099aea085d58d7bdc305de55228ac6939d472a221ca915753a2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to this malicious redirector, suggesting a phishing or scam attempt. The presence of many Shopify links, some benign and some potentially part of a link farm, further supports the idea of a content-driven lure.

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.link/pify?keyword=a5+leaflet+template+psd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/3269/6216/files/augusto_cury_mestre_dos_mestres.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/becoming_animal_david_abram.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/motetofevexoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/6677/6991/files/newakuru.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/gakunitudizurubuvojegis.pdf
    • https://cdn.shopify.com/s/files/1/0441/0641/6280/files/46528222354.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5456/files/73861086058.pdf
    • https://static.usrfiles.com/ugd/b6edda_ae5d49b90b9b48a7984de2887031555f.pdf
    • https://static.usrfiles.com/ugd/314c35_79f95f9a6282401ea1c7aba20055b736.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2904/files/55235647207.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/carbonyl_compounds_aldehydes_and_ketones.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/92024301098.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_off000089c2.bin
5b88ccd58ffe91ca7d1b88e7b284d5615c947e8f06806030571b2a8f1098d07f
pdf-font-stream PDF embedded font (sfnt) at offset 0x89C2 5204 bytes
font_01_sfnt_off00009b70.bin
ec1001571f741c4476c0841c7887b4faceddf9d685a027ebe6ea1296de33f677
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B70 10308 bytes