Malicious PDF — malware analysis report

Static analysis result for SHA-256 6986af79fd5b8ca8…

MALICIOUS

PDF

47.1 KB Created: 2020-08-18 17:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c5476a1a9aa619f918e947e1153c9db SHA-1: d909489c377dfd39103d6748eb6641fe2fec4ac0 SHA-256: 6986af79fd5b8ca87ce61099ef8c47d863e64091ecd8ea4471b96a38141cb93b
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure for a 'calendar creator program free' and presents a fake download button, aiming to trick users into clicking malicious links. The primary link identified, https://ttraff.cc/pify?keyword=calendar+creator+program+free, is flagged as a malicious redirector. The document also hosts a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a social engineering attack designed to lead users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=calendar+creator+program+free
    • http://files.terranceodette.ca/uploads/1/3/1/3/131398010/d7f2f759f.pdf
    • http://files.dalcpapc.net/uploads/1/3/1/4/131406505/5864517.pdf
    • http://files.burnoutsolutions.com.au/uploads/1/3/0/7/130739916/b8019cf4.pdf
    • http://kanamosum.plantoprosper.com.au/uploads/1/3/1/4/131405927/88d257af.pdf
    • http://files.fultonschoolspolice.com/uploads/1/3/0/7/130775922/kozowurivun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1808/2709/files/add_text_to_acrobat_pro_9.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/set_up_a_web_server.pdf
    • https://cdn.shopify.com/s/files/1/0437/5343/9383/files/59335446719.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/20799888256.pdf
    • https://cdn.shopify.com/s/files/1/0434/4309/3660/files/mpdf_border_radius_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/kamoripirovagogex.pdf
    • https://cdn.shopify.com/s/files/1/0444/0319/6070/files/psychological_assessment_kaplan.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/simafamumorikot.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/dumexadewopibi.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_off00007b5d.bin
3419b13c0c9bd74f58641e226c46413c2310097157469329254e9adf8adbfb51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5D 5204 bytes
font_01_sfnt_off00008cfa.bin
6676f994edfa48b09970e5effc9a5f5ebbfa06d4b7bfa47cafe4d640c5e316dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFA 10108 bytes

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