Malicious PDF — malware analysis report

Static analysis result for SHA-256 73727e39d6a5c612…

MALICIOUS

PDF

47.9 KB Created: 2020-08-31 00:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c9cd78b95c8cd08b487ae93e737a445 SHA-1: 77c1de71d6329a50d7c3e743161f038b27969447 SHA-256: 73727e39d6a5c6121bd141e255aaaa6b580d32d78a5e7e3ee021085eaaab1b7a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF contains a lure to install a browser extension or update, a common social engineering tactic for malware delivery. It also hosts a large number of PDF files, likely for SEO manipulation, and redirects to a malicious URL. The embedded URL 'https://ttraff.cc/wix?keyword=bulk+image+downloader+key+serial' is flagged as malicious, suggesting it's a primary distribution point for a payload or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=bulk+image+downloader+key+serial
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/duvibovupafodejid.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/11726896786.pdf
    • https://cdn.shopify.com/s/files/1/0462/5118/0183/files/insurgent_free_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/47108720709.pdf
    • https://static.usrfiles.com/ugd/b7ab08_17492dd85b6e4ad084a9b3edc05cd45e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2084220e84e24cd7899870b41787710d.pdf
    • https://static.usrfiles.com/ugd/b8c837_517bb12ce35b4db5bed64280fa04d8ff.pdf
    • https://static.usrfiles.com/ugd/eb6612_2998c4a6eb774ec899fd9e95480c27c4.pdf
    • https://static.usrfiles.com/ugd/cc14e4_269b182683f3451a8dfa95f3b91aa005.pdf
    • https://static.usrfiles.com/ugd/77d535_ed3044eff6dc43a5a46964747101e80c.pdf
    • https://static.usrfiles.com/ugd/225520_f144813392c14782a88e48d4ff8e0175.pdf
    • https://static.usrfiles.com/ugd/39cb9d_7123b1a23c3b49519af8112b8e9cfe34.pdf
    • https://static.usrfiles.com/ugd/0aab01_b05558f1c5334f25b6ca36b05c4be34a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c69bdd5ea6641f28ed114ab42664ee6.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/fundamentals_of_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/asus_pce-_ac88.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/vonukurujekiwokovew.pdf
    • https://cdn.shopify.com/s/files/1/0463/5970/7803/files/kms_activator_ms_office_2016.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_off000077de.bin
19affd19dba34d79095646eb57b38f129ce068f0fae2bad41914fc53e3b71467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DE 5452 bytes
font_01_sfnt_off00008a66.bin
36c50bc92e3fc88b212d592a7989d24ebccf3ca9526f35b59658c9414a99d07a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A66 12420 bytes

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