Malicious PDF — malware analysis report

Static analysis result for SHA-256 65967c2260d4007f…

MALICIOUS

PDF

46.1 KB Created: 2020-07-27 17:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8c21aa7daca4df083f9ef8fb229df81 SHA-1: fc372f1f775c28ed0b8774c4f83fc9f074e7e3c8 SHA-256: 65967c2260d4007fbd97432db161626889394f127a3acd65f60d49406258f38c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically identified as a redirector to malicious infrastructure. The document body and metadata suggest a lure for a free PDF download, which is a common tactic for phishing or malware distribution. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious redirector.

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.ru/wb?keyword=nudge%20pdf%20espa%C3%B1ol%20gratis
    • http://files.coastalgeorgiaaudubon.org/uploads/1/3/0/9/130969775/tolaza_gurilom_gozajelura_zixize.pdf
    • http://files.assertivelyapolitical.com/uploads/1/3/1/4/131453365/1511237.pdf
    • http://files.katianailedit.com/uploads/1/3/1/3/131383982/porimo-kesunubi-kuleme-relijokefifezup.pdf
    • http://files.francescobaroneguitarstudio.com/uploads/1/3/2/6/132695519/f31434023cc8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/pababadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/73329676488.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/54237695197.pdf
    • https://cdn.shopify.com/s/files/1/0428/5648/0935/files/77095024985.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/86435595501.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/mimadonejexabife.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8209/files/59366109427.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/wofokebujodumas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7740/2778/files/senelejisorato.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6981/files/pebevipuvewaledapipogiwit.pdf
    • https://cdn.shopify.com/s/files/1/0434/8326/7236/files/53940649286.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_off0000715b.bin
27bb974b1e9df45866062b72dedcadef50eeb0a1bc3f564dfba6495145db9d2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x715B 5164 bytes
font_01_sfnt_off000082f1.bin
7c0798f6414c4d20a76b4b0ba6037f99c842ae1ba5dddf72913cb917ad7c3f24
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F1 12792 bytes