Malicious PDF — malware analysis report

Static analysis result for SHA-256 11001b3cec1ee557…

MALICIOUS

PDF

42.8 KB Created: 2020-08-05 02:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1534c4ebd43c76f3b0a4482da0202246 SHA-1: 7f4e4a223156f9cc05837030a4f756ed7514947e SHA-256: 11001b3cec1ee5571c2803f1358593ac788c11d7189c78a521ff3d1f2b9aeecb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically the URL https://ttraff.com/pify?keyword=bobine+%25C3%25A9lectrique+pdf. This technique is often used to obscure the final malicious destination and evade detection. The presence of numerous links, many pointing to seemingly benign Shopify URLs, suggests an attempt to leverage SEO tactics for distribution. The ML classifier strongly indicated maliciousness.

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=bobine+%25C3%25A9lectrique+pdf
    • http://files.12stepstolovingtheself.com/uploads/1/3/1/6/131637679/vedubezadozu-zogizunosizap-guvinafevopas-pozusewuzusetu.pdf
    • http://files.meridianstats.com/uploads/1/3/0/7/130776393/kijalubebes.pdf
    • http://files.patryanglass.com/uploads/1/3/0/8/130874370/gugosijuxufalase.pdf
    • http://files.blankpagesworkshops.com/uploads/1/3/2/3/132302824/kesujaxarum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/legally_blonde_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/kozifinazopudepagitibazop.pdf
    • https://cdn.shopify.com/s/files/1/0440/4533/6726/files/faxakugorolininovitiro.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/lobubozosuturesizeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/6448/2202/files/wolunixup.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/fogokirubitekepe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/gubirufi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/34457283804.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/74927405186.pdf
    • https://cdn.shopify.com/s/files/1/0440/5864/0549/files/93421920269.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/buzasujusokuvokivumum.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/3364528289.pdf
    • https://cdn.shopify.com/s/files/1/0433/2614/4670/files/lusanadozulu.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_off000066d3.bin
c3af724aff5cbe5656be84a36ef293b41336ca1743f3668e7fa455259a6bbbef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D3 5216 bytes
font_01_sfnt_off00007859.bin
5c529a337ed6046fcfd9e318329eaef7bc712db2d062fd7a6631238d497c9759		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7859 11444 bytes

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