Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ededceab20783b…

MALICIOUS

PDF

48.6 KB Created: 2020-07-30 05:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb86fc8c2447930740fd5af23b211359 SHA-1: 5921f041127e8053519412b3a467c1f144b05768 SHA-256: 03ededceab20783b0f2cea48b24f0bccd6e9caa5708f1ebe64dbb8c15b102b1a
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.cc). The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install a browser extension or update, a common social engineering tactic. While no scripts were extracted, the presence of malicious links and the lure suggest an attempt to compromise the user, potentially through a drive-by download or phishing attempt.

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/pify?keyword=add+text+to+pdf+free+download
    • http://files.readerschoiceworks.com/uploads/1/3/1/3/131397946/jigexawotok.pdf
    • http://files.frankrostron.com/uploads/1/3/0/8/130874563/misirur-sebivekabodo-gadajixezarilu-fedowizijufeg.pdf
    • http://files.tenzafansite.com/uploads/1/3/2/6/132681660/powoduni.pdf
    • http://files.nepans.org/uploads/1/3/0/8/130813546/6af323.pdf
    • http://files.lindamarionartworks.com/uploads/1/3/1/8/131856205/c9f8b0c1b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/75668944124.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zadolodiwifunum.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/86585908247.pdf
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/bamadaduwutokuzavuzigir.pdf
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/patinomolenududuxiseje.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/vejebaxawesupisinafo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/8386024176.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/51778002238.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0428/3275/6902/files/tepinogagibo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/jolabitalip.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0050/files/roxoxozabuna.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_off00008129.bin
c65b3e32c285f6841b57aedb70498687de50922070f2ba7912435c2b0658907f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8129 4744 bytes
font_01_sfnt_off00009165.bin
d69e042a668c24844c35020419da9db7baa49f862efa1d9030466bbbac70830e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9165 10976 bytes

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