Malicious PDF — malware analysis report

Static analysis result for SHA-256 673542f5fc4e7f15…

MALICIOUS

PDF

65.7 KB Created: 2020-09-01 21:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6022a9fc1ace67aedafbf88592422707 SHA-1: 133408528f0ede456621cd8a192a73eea6901c59 SHA-256: 673542f5fc4e7f151f3a7f511b3747613d2de608c2fd46526d4f3f3b34d05348
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting the document's primary purpose is to lure users to this site, likely for further exploitation or phishing.

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/wix?keyword=anticipatory+bail+in+uttar+pradesh+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/2d1648_2b59078b071044a7b39ae04234641c34.pdf
    • https://static.usrfiles.com/ugd/0d002d_2345f36ea3224ad68647eb8edff9e54a.pdf
    • https://static.usrfiles.com/ugd/b5472a_4d92df791bd84e12be529a99640e47fd.pdf
    • https://static.usrfiles.com/ugd/37428b_aec2f237b39b489190037b16985e431e.pdf
    • https://static.usrfiles.com/ugd/837d34_d26f36a649084e07a809d842f28bff11.pdf
    • https://cdn.shopify.com/s/files/1/0440/4684/4054/files/wonofiludaratiwu.pdf
    • https://static.usrfiles.com/ugd/ee6100_fae4887cff294a82afca9e8446af3c97.pdf
    • https://static.usrfiles.com/ugd/47b1e8_05f03c9ef05d4d2aa3656bd7d460d0ce.pdf
    • https://static.usrfiles.com/ugd/d2751c_c7095180891d47aca2a7cd21cbd7d3cc.pdf
    • https://static.usrfiles.com/ugd/f46427_601f75004eab4ad0af1381daf436b9b8.pdf
    • https://static.usrfiles.com/ugd/b58d21_ec1991cd6f7444f6b52007d82e5fc121.pdf
    • https://static.usrfiles.com/ugd/73c254_7d44264bf01e4229bbbab582cad46ad2.pdf
    • https://static.usrfiles.com/ugd/99a8f2_a45d7d68bc8f4990bea12552b1bec628.pdf
    • https://static.usrfiles.com/ugd/fac845_4b10b552e99442f0ae5958d7abcfa5f3.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_off0000c467.bin
d1eaa8532d9985d12e8288f95ce3bd03a99a084f153eb7d90c46754c0df636dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xC467 5472 bytes
font_01_sfnt_off0000d701.bin
6aaedaac03fd974e23a20562768e1c5c277f1caa93aadccca6f359b624282e92
pdf-font-stream PDF embedded font (sfnt) at offset 0xD701 10104 bytes