Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4f7fc571c97f6f…

MALICIOUS

PDF

42.8 KB Created: 2020-07-26 18:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20b5319362ea345a986a434c9bae6498 SHA-1: 0820842283b23d42266c5b226643822f5c07a115 SHA-256: 5d4f7fc571c97f6f1c2350b47cc9e5debc5917118ffa83b2663c6ef878c820bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector URL known for malicious activity. The ML classifier also strongly indicated maliciousness. The primary malicious behavior observed is the attempt to lure users to external, potentially harmful, websites through a link farm.

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.ru/pify?keyword=guide+to+iceland+book
    • http://files.iwanttobeanengineer.com.au/uploads/1/3/1/3/131383760/69766.pdf
    • http://files.karilagandancesociety.org/uploads/1/3/2/7/132712057/3463889.pdf
    • http://files.backbonesports.com/uploads/1/3/1/0/131070579/d3336aa1cca.pdf
    • http://files.mezzanineboutique.com/uploads/1/3/2/6/132695492/2739078.pdf
    • http://files.fauncechurch.com/uploads/1/3/0/7/130740571/1db84a22.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/dabozolezubepulitevedava.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/57417604497.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/82037939507.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9946/files/wurorujag.pdf
    • https://cdn.shopify.com/s/files/1/0432/4029/2520/files/85478568886.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2198/files/nomuroji.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/60218225163.pdf
    • https://cdn.shopify.com/s/files/1/0436/6571/9449/files/sebejosazusililozodos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/8376161511.pdf
    • https://cdn.shopify.com/s/files/1/0432/0188/8416/files/88041185518.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/selezebakoniweji.pdf
    • https://cdn.shopify.com/s/files/1/0436/8911/5801/files/jogosenodefe.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/79867954441.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_off00006abb.bin
7f09ed54cb5a0fd228ad8385cc170d5a61fab32b9d3ee35f9e41297cfb8bd0d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABB 4776 bytes
font_01_sfnt_off00007b09.bin
8f4ff554fa6eff12fc143a8a6dc1c62b2b7f21f4190b348bcc76ac811a052956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B09 10216 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.