Malicious PDF — malware analysis report

Static analysis result for SHA-256 7446d956faa25bd2…

MALICIOUS

PDF

44.8 KB Created: 2020-08-30 12:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 390cc3e4096fdbcdb61961475bc2e430 SHA-1: 22fb3622c89b3acc559b59d1150b369f41edfe52 SHA-256: 7446d956faa25bd23b3cc06bf56da0cdd4aa4cc98c4f0e9802d114bd35e42170
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, ttraff.cc, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains text related to 'Cemu stopped working' and references the authoring application, suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the ultimate destination.

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.cc/wix?keyword=cemu+stopped+working
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/3005/2769/files/63243695833.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/65589046415.pdf
    • https://cdn.shopify.com/s/files/1/0438/4532/0861/files/92695618213.pdf
    • https://cdn.shopify.com/s/files/1/0434/5492/2902/files/xaxebevalebakowa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2047/6828/files/tekogunev.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/american_hunter_feeder_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5984/6051/files/gabaxiriwawenejegozexel.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/47909842588.pdf
    • https://static.usrfiles.com/ugd/b8c837_877179e9127044b5944510eb7fb2d58f.pdf
    • https://static.usrfiles.com/ugd/9757e7_ede95a310fbb4f70a4db17ebc20a019d.pdf
    • https://static.usrfiles.com/ugd/756799_78aff8f37aa04b5d99c94bd954149c75.pdf
    • https://static.usrfiles.com/ugd/fb83f1_9db442ce145a4f4985fa4f71640de2c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_edd33d551f4f421bb0b5ca9025c349b7.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_off000071a2.bin
12dbc924f0fb96306a3b5c8b5dba7631ef7ab24811ec09f5bf1e99b94d6d30dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x71A2 5096 bytes
font_01_sfnt_off000082f9.bin
e5bd9cb8db4254f8a5b1653415c1edf967be641919399ab99e828c4ba835aa0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F9 10308 bytes