Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb219e52c66f6703…

MALICIOUS

PDF

41.9 KB Created: 2020-08-15 13:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5ff759907e85a6af95919cf738c2277 SHA-1: 499e981548d32db2000540d88e03b932abb450e2 SHA-256: eb219e52c66f6703e1cc74aa9e0718662a404f368c04dcba1e7ad9cfe1a95537
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wb?keyword=labview%20interface%20for%20arduino%20tutorial%20pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0431/4379/0760/files/rekefomekijadunowirelar.pdf'. The document body, though heavily obfuscated, contains text related to 'labview interface for arduino tutorial pdf', suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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.com/wb?keyword=labview%20interface%20for%20arduino%20tutorial%20pdf
    • http://ruzipase.absolute-electric.com/uploads/1/3/1/4/131406082/zifuvetisideg_dumam_nedokopajo_pogawaxoni.pdf
    • http://files.satellitecitybmxclub.com/uploads/1/3/0/7/130739831/zomeruwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/rekefomekijadunowirelar.pdf
    • https://cdn.shopify.com/s/files/1/0435/1862/3896/files/capgemini_technical_interview_questions_for_freshers_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/69643882212.pdf
    • https://cdn.shopify.com/s/files/1/0435/5696/2465/files/definition_of_clothing.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/nereginuvapukimiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/3400/2086/files/48432680644.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/pepivil.pdf
    • https://cdn.shopify.com/s/files/1/0435/4375/6954/files/68704680461.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7728/files/63843791176.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/85001135734.pdf
    • https://cdn.shopify.com/s/files/1/0436/9481/7435/files/22032218108.pdf
    • https://cdn.shopify.com/s/files/1/0428/4642/1158/files/faithless_drifting_away_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/nizuk.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_off000066c4.bin
edddfb00fba3ef2681b7b3bcddc0e490787b76000c1fac538ea7c5709327cf7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C4 5204 bytes
font_01_sfnt_off00007899.bin
cbc68c63a4aec0980e108b4a85bbbb70c99d8c233501da8bc90a03576d3eb06b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7899 9952 bytes

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