Malicious PDF — malware analysis report

Static analysis result for SHA-256 03787dc6c99f94e9…

MALICIOUS

PDF

51.3 KB Created: 2020-08-21 18:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8969f776331c74e0dcfdc2f891251f68 SHA-1: 088809cae62ac6d9a2eea3da5bc2b7add45378af SHA-256: 03787dc6c99f94e9286154a5f783ba66f0d08ce5a3b1d213f7b75e4266680193
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF filenames, suggesting a lure to disguise the malicious intent. The primary malicious URL is https://ttraff.ru/pify?keyword=bates+motel+season+3+subtitles, which is likely used to redirect users to a phishing or malware distribution site.

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=bates+motel+season+3+subtitles
    • http://lemubo.mylifebuilder.org/uploads/1/3/0/7/130776167/6822367.pdf
    • http://files.phoenixrunners.ca/uploads/1/3/1/3/131398075/fiwefosodawewov.pdf
    • http://files.tonypalermolifecoach.com/uploads/1/3/0/7/130740589/novujusoluliru_sirijinasizi.pdf
    • http://xipude.1waybusinessconsulting.com/uploads/1/3/1/3/131380213/kusenukumudikake.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/70859952689.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/2018_funded_courses_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/tikov.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0985/files/xulusoda.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/pakerijivas.pdf
    • https://cdn.shopify.com/s/files/1/0435/1141/4939/files/common_american_idioms.pdf
    • https://cdn.shopify.com/s/files/1/0432/7184/8100/files/56092002082.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/kumenexepokajiguwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/effective_selling_skills.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/el_catecismo_de_heidelberg_una_explicacion.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/bookmate_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/ukulele_fingerpicking_lessons.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ac.bin
edb714468bc8b941b1f6e13b9fd21eaf240782d998bd9701198b8151cac19384		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AC 5192 bytes
font_01_sfnt_off000074cd.bin
e2d0dd2979c3de13be0e1811e175f9c0d734c18a91cf72baa55caab322a744f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CD 5088 bytes
font_02_sfnt_off00008609.bin
9d24b7b953cba6e2fb03bbcbf0f920325216a396b3643ce2fab5ac54ba5bfc63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8609 9792 bytes
font_03_sfnt_off0000a7cd.bin
cc86994599ca2b6bade3ef2a24080e5ca7d0105f80c2e61a4a6d43fb5994c661		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7CD 16684 bytes

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