Malicious PDF — malware analysis report

Static analysis result for SHA-256 161d754717727dc3…

MALICIOUS

PDF

45.8 KB Created: 2020-08-24 21:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4a52067ac28c4888111decbeac4c1df SHA-1: c0199dcba90f4033d4cf656cec89526940354441 SHA-256: 161d754717727dc38de3cfaf84ed300de950912fd617ea446f0d91412758b225
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a malicious redirector and the ML classifier's high confidence score indicate a malicious intent.

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=astm+a106+grb+pdf
    • http://bupadof.softcinch.com/uploads/1/3/1/3/131380504/dd7776096a0e34b.pdf
    • http://files.asliagirbas.com/uploads/1/3/0/7/130776841/07f27bfa0f9527.pdf
    • http://dejem.ratemyfosterhome.com/uploads/1/3/2/8/132814930/8050847.pdf
    • http://files.cailenfu.com/uploads/1/3/1/4/131437444/rutez_wubusaxofab_kajali_zuwogor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3616/3747/files/kepedikezekuwab.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2246/files/kobofajir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nitupalakisotubawu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/small_business_website_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/alternative_dispute_resolution_in_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/lowotixiges.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/jumukulazuwoxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/vulapodoset.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/android_canvas_draw_transparent_rect.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/xoraranuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/2199/1079/files/tutedesewokakudiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2026/files/95048209910.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_off000071b0.bin
946d8bd84aa7dd68a3134e54e05064640bef7f4e250443866b5df576c0f60949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B0 5808 bytes
font_01_sfnt_off00008548.bin
b260f3bfdded6dce685fb3417a2cff44e3387e41ddaba13fcf8cfc8b49212e92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8548 10948 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.