Malicious PDF — malware analysis report

Static analysis result for SHA-256 800023b55e84b156…

MALICIOUS

PDF

56.3 KB Created: 2020-08-05 10:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d32304220e14b902199c78e3e3a89fdc SHA-1: d05096ed50a57209a2d7d5f42c4be15bac25b93a SHA-256: 800023b55e84b156a56662141f8553ccbe65633032cdcb3a9b098396e2b77914
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, identified as a link farm, directing to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=arduino+bluetooth+projects+pdf', suggesting a lure to download a PDF related to Arduino projects, which then redirects to malicious content.

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.cc/pify?keyword=arduino+bluetooth+projects+pdf
    • http://files.evansadopt.com/uploads/1/3/1/6/131637723/0df9f31c0.pdf
    • http://files.red-lotus-consulting.com/uploads/1/3/0/8/130813757/6373fb.pdf
    • http://files.carolconnor.net/uploads/1/3/1/4/131406448/rezurorelemaki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53981477141.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/nilikozewexumowipuxebuwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/sovenuzepedilelizotij.pdf
    • https://cdn.shopify.com/s/files/1/0432/5169/5771/files/26218543762.pdf
    • https://cdn.shopify.com/s/files/1/0434/1877/9815/files/jizoziwebas.pdf
    • https://cdn.shopify.com/s/files/1/0447/6325/0839/files/western_blotting_principle_and_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0430/1986/2179/files/64933491035.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/wutelezago.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/jinedanobasuxagifazopet.pdf
    • https://cdn.shopify.com/s/files/1/0428/0880/3495/files/27494865122.pdf
    • https://cdn.shopify.com/s/files/1/0432/0916/2907/files/41801447395.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/42389732850.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0951/files/63066791153.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_off000096ba.bin
b7d5231db659fe8d5e0b093caef9becfd8cfa64fa21652d3f9072a566bc7fd4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96BA 5240 bytes
font_01_sfnt_off0000a885.bin
40d7b6984054ee6975c99c659220eeb32c56d6ce72eff5bf51c92fdc423e2a3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA885 13776 bytes

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