Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc6ceaba43acd51…

MALICIOUS

PDF

39.6 KB Created: 2020-08-03 20:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c9856f3458ea0e53d110555b156a267 SHA-1: 36d47a1bdd310ef8722f56defcff9741be6eb0c8 SHA-256: 5cc6ceaba43acd5111aa2d81585e2c3473d77ac1fe7c964a83633ccc3794cc79
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector to malicious infrastructure, disguised as a free guide. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the primary link leads to known malicious redirector infrastructure. The presence of numerous other links, many pointing to Shopify domains, suggests a link farm designed to obscure the ultimate destination and potentially for SEO manipulation. No scripts were extracted, but the overall structure points to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=gu%25C3%25ADa+completa+de+calistenia+y+street+workout+pdf+gratis
    • http://files.nachnook.com/uploads/1/3/0/7/130776481/sabuwume.pdf
    • http://files.mrsbockiusclass.com/uploads/1/3/0/7/130739119/limixuge-kuvipujixube-takiwided-kadafisuwipon.pdf
    • http://files.alohaacaibowls.com/uploads/1/3/1/4/131483281/7126993.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/17097300976.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/29504753794.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/96253926350.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sozolomunegodufedawugiwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jujirufevob.pdf
    • https://cdn.shopify.com/s/files/1/0437/2581/5959/files/28990295671.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/46468047643.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/6024950969.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/minivipoxiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/titixabik.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9606/files/60982685513.pdf
    • https://cdn.shopify.com/s/files/1/0434/9932/3558/files/rugoretekijipigukiwajipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/34440201470.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_off000057c4.bin
89c1d3c6dcde34a129e46a5199a5e9d3af1eb2d35d0609b2fba254d2c10f0877		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C4 5820 bytes
font_01_sfnt_off00006ba9.bin
920b7855d6174b328873a74a95712269ed224f21eb177e5bd976d8499663c45d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA9 10364 bytes

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