Malicious PDF — malware analysis report

Static analysis result for SHA-256 700ad083dcdb507a…

MALICIOUS

PDF

45.4 KB Created: 2020-08-02 08:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c91e9dcc75d9f8c4bedf2a520a627dd SHA-1: 4a44a3bdf0658112b34dc3e552287725c35bf3c0 SHA-256: 700ad083dcdb507abd04584946b1678dfae5742bfc5eb3a9eae406c9b418bdb7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document's primary purpose is to lure users to external sites, likely for phishing or to download further malicious content.

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/pify?keyword=ducky+macro+2.+0
    • http://files.caringnannies.com/uploads/1/3/1/0/131069899/1c505d3e.pdf
    • http://files.topographyofmirrorcities.org/uploads/1/3/0/7/130739510/f8ca4.pdf
    • http://files.thechangemanagementnetwork.com/uploads/1/3/1/8/131871424/8749672.pdf
    • http://files.johnhartfarms.com/uploads/1/3/1/3/131384401/basoputatobefime.pdf
    • http://files.planetmediapresspublications-newcomsystems.com/uploads/1/3/2/3/132302995/3583888.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/posenofijekinifuzemoma.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/weguw.pdf
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/95345727463.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/www._iomega._com_users_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/81216886062.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2545/files/chemistry_molecular_approach_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/funixu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/muwijewa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/38669125157.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/poxokanadowifuxumiro.pdf
    • https://cdn.shopify.com/s/files/1/0437/2407/9254/files/9730036671.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/mepebigutotifekole.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/25989912138.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_off000069c1.bin
688927fa7e44ec8c41c36cf238bdcaedb1da3d8a62bb8ee78dcf6a3d7d84b8eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C1 5204 bytes
font_01_sfnt_off00007b76.bin
b87304ef711aff135f4bae2a513b517e5db10ee6224ca92b16bd37e07f64a4b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B76 17196 bytes

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