Malicious PDF — malware analysis report

Static analysis result for SHA-256 1000100bf539e12e…

MALICIOUS

PDF

36.1 KB Created: 2020-08-14 22:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6919741993ad0c2ce68666498064d4f SHA-1: 1215c31db735a0bb19acc97c74057c43860d0da2 SHA-256: 1000100bf539e12eb14b86ea04130953c56fc07fe9e92eec366907c860049efa
202 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external resources, and includes a lure for browser extension installation. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=audio+cutter+software++for+mobile'. This suggests the document is designed to trick users into clicking malicious links, likely to download further malware or redirect to phishing sites.

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.com/pify?keyword=audio+cutter+software++for+mobile
    • http://pulaned.tetasbeerblog.com/uploads/1/3/0/7/130775288/vetivajo.pdf
    • http://zijokukok.stnickskenosha.org/uploads/1/3/1/4/131406982/xoseresawiw.pdf
    • http://files.stogasmith.com/uploads/1/3/1/3/131380728/6602835.pdf
    • http://files.gesta-goddard.org/uploads/1/3/1/3/131379622/09303c474f4.pdf
    • http://files.gibsonorthotics.com/uploads/1/3/2/6/132682852/b2c0af59e4cdf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/imperative_sentences_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/kenmore_series_500_washer_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/432518843.pdf
    • https://cdn.shopify.com/s/files/1/0433/8604/4572/files/invisible_character_steam.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/37987247464.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5976/files/89412823505.pdf
    • https://cdn.shopify.com/s/files/1/0440/4323/9589/files/39455227198.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/biwij.pdf
    • https://cdn.shopify.com/s/files/1/0433/2604/6362/files/tchaikovsky_symphony_6_score.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/24857350301.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_off00004e44.bin
94165f1481b510c9420328b524cf646eae89a3185f2aa558b4cd4d74fe227298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E44 5388 bytes
font_01_sfnt_off00006089.bin
41e65c506f21b5a49c4de94d4fb0a90acde136f035259769dbbb684e578ec92f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6089 10308 bytes

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