Malicious PDF — malware analysis report

Static analysis result for SHA-256 865e4f22decd7c56…

MALICIOUS

PDF

38.6 KB Created: 2020-08-29 00:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f07425804488cec4dbec95ceb1a0a08c SHA-1: ccebea4466413238c709947188f574202b7a442c SHA-256: 865e4f22decd7c5677d4b3420859ad2776f79d2e36555e8995677aa4a88933c6
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm designed to redirect users. One of the primary links, 'https://ttraff.com/wix?keyword=shazam+for+blackberry', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, suggesting an attempt to lure users into clicking malicious links.

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.com/wix?keyword=shazam+for+blackberry
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f567e457d5834630a72c88a801cf185e.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f3fbc9f2fba4818ba50ef98047c3bf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_269a0ae271c24819a837d7c986639da6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b22a068bcf0949e3abe4af7e7f038f4d.pdf
    • https://cdn.shopify.com/s/files/1/0440/6129/4757/files/vizivimakeroza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/taxopupotukedipu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/zumexesetapemokijoweju.pdf
    • https://cdn.shopify.com/s/files/1/0440/2026/9221/files/jogebomupozod.pdf
    • https://cdn.shopify.com/s/files/1/0429/8260/4963/files/butobisenikowoboriz.pdf
    • https://cdn.shopify.com/s/files/1/0438/8107/0747/files/appareil_genital_feminin.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b1b134a029a4bcb96da76c7124c2d58.pdf
    • https://static.usrfiles.com/ugd/b8c837_86e0a1df3c06419284ae1ae96e394199.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_off0000589b.bin
da4c741929a8276b214236fe6cad851f0d27f757b04ab65bd188d66390010b54
pdf-font-stream PDF embedded font (sfnt) at offset 0x589B 5400 bytes
font_01_sfnt_off00006ae5.bin
449a4eb9f6897624aad4c280959578c3e9a355cdb179b1dc593c6aceb8c0b834
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE5 10340 bytes