Malicious PDF — malware analysis report

Static analysis result for SHA-256 712bbfdf7c23e980…

MALICIOUS

PDF

53.5 KB Created: 2020-08-15 00:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42eeae0b9274a26287dddbdef5a53648 SHA-1: cb439fdda9238c515bd55b78ee2f7d1e3bf73a88 SHA-256: 712bbfdf7c23e980dbdf4ed4da14429a3b42142b71bb42bbfe28c31fa1f197d6
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised with keywords related to software. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous external links suggest a link farm or redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection lure.

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/pify?keyword=epanet+software++for+windows+10
    • http://files.keepinitreelchartersunlimited.com/uploads/1/3/2/8/132814996/makos.pdf
    • http://files.mountainteachings.com/uploads/1/3/2/8/132815342/zivejex_vegaxujikarara_nadutoz.pdf
    • http://farilikim.katetobin.com/uploads/1/3/1/0/131071164/8867709.pdf
    • http://files.justbcosmetics.com/uploads/1/3/1/4/131483955/mofalomuwurevo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0439/8252/0478/files/calculations_in_chemistry_dahm_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/70133549832.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/jefevuba.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2679/files/xatajerulox.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/fujid.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/limobosebivogolixebebex.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/43642681050.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/pandoc_markdown_to_code_highlighting.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/vawukakuzakipisesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6111/files/43331236930.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/90204139933.pdf
    • https://cdn.shopify.com/s/files/1/0430/4925/5061/files/5172332569.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007896.bin
a065be931404d9b3ea8769b5266220b54384aca80da7c6790c9d413746e5b8e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7896 5244 bytes
font_01_sfnt_off00008a81.bin
9d260e5ef05587e3bbe33ff803d938c2ae4f6b570f66e22bf9186ae2956b11f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A81 8996 bytes
font_02_sfnt_off0000a380.bin
a262b39cb1c68d10e850b42662f06e1e5f6a3204a9862ab8851dfec73e674162		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA380 10164 bytes

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