Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ee486695cbc582…

MALICIOUS

PDF

37.2 KB Created: 2020-08-25 20:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ec948752b1a6f14378415ea66a87f9e SHA-1: b0f67707b62e6b8185ca0049f0f00cb868d0d765 SHA-256: 10ee486695cbc582a28a4691f125e899d3a5d59fa107ac190b03bcf58db0e36e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This indicates an attempt to lure users to malicious sites, likely for phishing or further malware delivery.

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.me/pify?keyword=10+palabras+con+acento+prosodico
    • http://ritija.sweetwoodpsych.com/uploads/1/3/2/7/132740748/ef86c3a53b.pdf
    • http://mojabuz.landscapegardenerscamberley.co.uk/uploads/1/3/1/4/131483245/lebajojom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0445/4852/2143/files/rusujabukibatikeduleriw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/zikijivinoxuwolijivik.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/76833355984.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/36416949608.pdf
    • https://cdn.shopify.com/s/files/1/0433/8352/1445/files/adobe_illustrator_tutorial_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/rebiwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/angular_limb_deformity_in_foals.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9173/files/mediwul.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_off0000508a.bin
fb7e1743c7365d81eddda91eeedd2ed53cdd8128028b4facd1a62523eeb928d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x508A 5304 bytes
font_01_sfnt_off00006285.bin
92024829c31c488db7a4adea2188fcf217f1e084604c227778802c2b60b2614a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6285 11160 bytes

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