Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbecfadeb27aac5…

MALICIOUS

PDF

53.3 KB Created: 2020-08-22 09:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e7132350c626a26683b2dbd6e227433 SHA-1: a923f57b81ef5e21a994277e94bb4afde21d76e8 SHA-256: 5cbecfadeb27aac5c3ce7a43b745c786b51d35054fdfb52288318d126c56a0a1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and links to a known malicious redirector, traff.com, which is disguised with a Minecraft-related keyword. The document body also contains numerous links to PDF files hosted on Shopify and other domains, suggesting a link farm or SEO poisoning tactic to increase visibility. The primary malicious intent appears to be redirecting the user to malicious infrastructure.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=minecraft+animation+maker+online+no
    • http://nofuk.hygildsabc.com/uploads/1/3/1/8/131856584/2253544.pdf
    • http://files.pagemusicale-lfs.com/uploads/1/3/1/4/131436956/wasoz_tiwes_gofatopat.pdf
    • http://bidobuxus.peterandpaulapixie.com/uploads/1/3/1/4/131454215/kuduj-lumataw-wenuxewud-bofixev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4618/2822/files/povibatavasepexukonakupi.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/kumibimuwekijop.pdf
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/16849857436.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/pidexobelatuwowirugojeku.pdf
    • https://cdn.shopify.com/s/files/1/0447/9113/6422/files/90141719255.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3785/files/futureburebobamijakikafe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/gorazolavodafusaruwoges.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/kegos.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/partes_que_conforman_un_proyecto_de_investigacion.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/66744655749.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_off00009388.bin
3bb6aec16d856aa56ae93a68db46d3e048c0b024c3b4a524fa20cab0f569c52f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9388 4916 bytes
font_01_sfnt_off0000a42e.bin
f51186d7730949e7c30893f54ad6b4b9b1936c120cf2d606a6b7894419803b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA42E 10668 bytes

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