Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbeef18ede2d517e…

MALICIOUS

PDF

48.1 KB Created: 2020-08-11 19:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da97865df3babfeeeb1b5d6449fb7cda SHA-1: 532ff70e41cc4c3bda5c08e7cd7fb08a1162ef16 SHA-256: dbeef18ede2d517ed207dd1e6051aa0a14f546b1aed51faa24ba3aaa981ef9b8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'varicocele natural treatment pdf' and the malicious URL, suggesting a lure for users seeking medical information. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

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=varicocele+natural+treatment+pdf
    • http://files.kickitsocialregistration.net/uploads/1/3/1/1/131163777/101c7c606bf85.pdf
    • http://files.fasttrack.cognitiveguidance.us/uploads/1/3/1/4/131437074/9015383.pdf
    • http://wimomazil.click2detail.net/uploads/1/3/1/8/131871745/727186.pdf
    • http://lejuve.mentalpraxis.net/uploads/1/3/2/8/132814930/juxegoseda-furora-nurafukofi.pdf
    • http://files.dhendricksonphotography.com/uploads/1/3/0/7/130739368/nuwowulijudeti.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/91696031586.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdf
    • https://cdn.shopify.com/s/files/1/0433/5383/3637/files/da_form_2404.pdf
    • https://cdn.shopify.com/s/files/1/0428/4468/4454/files/vovekuxivijovapara.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7372/files/77149460190.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/axis_bank_forex_card_rates.pdf
    • https://cdn.shopify.com/s/files/1/0439/0679/3627/files/rituzibukegamigofa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8007/0808/files/cambridge_latin_course_book_4_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0305/2191/files/gofeguderirotifugi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2783/1716/files/pune_ring_road_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5025/files/wibim.pdf
    • https://cdn.shopify.com/s/files/1/0434/0337/8839/files/rilatujeligo.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f66.bin
f7122532ec9af1ba5371bae822ca198dd2343f318124e6c4866f5991c6670bd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F66 5088 bytes
font_01_sfnt_off0000909c.bin
20a13296b7a80c0ac57ef7a4ad28c5640d865d6e9ccd303d081725f8d3f9e1a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x909C 10032 bytes

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