Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b415876efd2881…

MALICIOUS

PDF

49.0 KB Created: 2020-07-30 20:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9f18d128d65a5ecc2a4736cd08d576fe SHA-1: 342173c910423cdc4feba6c8ba83ea69e2cda14e SHA-256: 46b415876efd2881b8714a98ec77c9428258483cc11713492af61f76cebefdd8
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/pify?keyword=data+structure+algorithms+tutorial+tutorialspoint+pdf In PDF document text
    • http://files.hotseatcustombaits.com/uploads/1/3/1/0/131070124/7a0a8.pdfIn PDF document text
    • http://files.mca.school/uploads/1/3/0/8/130814749/tivagalutonevob_rulakezosagizu.pdfIn PDF document text
    • http://files.captainshreveladygatorsoccer.com/uploads/1/3/1/4/131407138/ac0e9.pdfIn PDF document text
    • http://files.eugenemontgomery.com/uploads/1/3/1/4/131438766/zesolabugilobe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/jupukonerudotujosob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/wojelut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/15196528854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/jugaves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/99232612479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/zumavuboroligavij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/gexomenipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/31254822084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5951/9394/files/89552083639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/matuwevovadipefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6352/5026/files/mubegevuwarenebubujawexig.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C79 5452 bytes
SHA-256: 15bcefa8fd6c972ee06deb21580055f85170eee070838a11dd37d81f596c3416
font_01_sfnt_off00007ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED6 10088 bytes
SHA-256: bb24fdeb5cb8cf63c84511620496b3a3622e2b6829ab73f240f785960113e7ba
font_02_sfnt_off0000a15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA15D 16112 bytes
SHA-256: 275d0ef8f619a30f75d5b67021c85ffe51dbf44d82a44ecb2d07128ff93f9399

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