Malicious PDF — malware analysis report

Static analysis result for SHA-256 79651a0e84f0b7bf…

MALICIOUS

PDF

38.5 KB Created: 2020-08-22 15:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5885595ac30b205274a04bede987cdb0 SHA-1: 482c4bbb9deaf2dc8ee1a8ce04b6234bfd02e2de SHA-256: 79651a0e84f0b7bf5a2ab0bcf74407775962f76a150c187ad44456c309887668
202 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics, including a fake download button and a lure for a browser update, to trick users into clicking malicious links. The primary link redirects to known malicious infrastructure, indicating a likely attempt to deliver a second-stage payload or phish for credentials. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=game+insaniquarium+free+full+version
    • http://files.sew-at-home.co.uk/uploads/1/3/2/6/132681443/safafofozudul-mezabagetug-razimodogewu-wofazubo.pdf
    • http://files.wolffwords.com/uploads/1/3/1/3/131397940/5b573e5d9.pdf
    • http://rileg.heraldinghistruthministries.com/uploads/1/3/2/3/132302782/5de8c.pdf
    • http://girezafo.mazopublishers.com/uploads/1/3/1/8/131856080/9885688.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/25667390418.pdf
    • https://cdn.shopify.com/s/files/1/0433/9191/0038/files/64202178678.pdf
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/corresponding_and_alternate_angles_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0210/files/gekevedawu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/64978092995.pdf
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/aafco_pet_food_labeling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/9344/2208/files/86000523510.pdf
    • https://cdn.shopify.com/s/files/1/0437/5583/1445/files/dajavepagujuja.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5199/files/fallout_3_fose.pdf
    • https://cdn.shopify.com/s/files/1/0440/6598/0581/files/73619706366.pdf
    • https://cdn.shopify.com/s/files/1/0435/9910/2115/files/synonyms_dictionary_free_download.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_off000058a2.bin
3534faf4090b97cc5b3e6fbfb7fe9df29392e2eb1c8cf252818bb48edcd00308		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A2 5132 bytes
font_01_sfnt_off00006a13.bin
4397b41289a0057a26a10ac733286310f8e084425837f120d82f5b5c9de28cd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A13 10256 bytes

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