Malicious PDF — malware analysis report

Static analysis result for SHA-256 5614ec14aa1fc57e…

MALICIOUS

PDF

40.9 KB Created: 2020-08-07 05:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f67255a508986727cdb1977511263e34 SHA-1: a848de7a87daec10b052edd091af560f96e86aa4 SHA-256: 5614ec14aa1fc57ed8b2802a1a9d3bc8a6be6983606fe21b42d9146b39b8540c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary malicious URL being https://ttraff.com/pify?keyword=c.+m.+s.+e.+d.+medicine+list+pdf. This indicates a link farm or redirection attack, likely intended to lead users to phishing or malware distribution sites. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=c.+m.+s.+e.+d.+medicine+list+pdf
    • http://files.elocruz.net/uploads/1/3/1/3/131382092/3167197.pdf
    • http://files.beckagriffinillustration.co.uk/uploads/1/3/1/8/131871602/napuzofo.pdf
    • http://files.reallynicereviews.com/uploads/1/3/1/8/131856380/rigufefa.pdf
    • http://files.myeagerlaw.com/uploads/1/3/2/6/132696060/7559619.pdf
    • http://files.crystalconnections.co.uk/uploads/1/3/1/6/131607005/tudalek.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/google_translate_website_url.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/29040005128.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/11144572984.pdf
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/74483931013.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5883/files/understanding_and_using_english_grammar_teacher_s_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/ketupelexa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8209/files/39041978517.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/43469206411.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/xinuleveduxilidokato.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6384/files/56539514652.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/gamukafo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/felebugijubaxekekodizowew.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_off0000624b.bin
597cdc68cc9f4385f1e96f05ab2cd2fb6942c44f92d44670c6df65437f16a825
pdf-font-stream PDF embedded font (sfnt) at offset 0x624B 4932 bytes
font_01_sfnt_off0000730e.bin
8c08be22b5abd0fc3cae6059b7f94be984a332bbc52f27adf4ce56a568d2934e
pdf-font-stream PDF embedded font (sfnt) at offset 0x730E 10336 bytes