Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b58cbdd462b86fe…

MALICIOUS

PDF

41.8 KB Created: 2020-08-25 02:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39a37e2a3d83ce1d4eafbb61101165a5 SHA-1: 77e771707a4c41cb1e6e183754aaa20814d24025 SHA-256: 3b58cbdd462b86fe0c7ff78f65f68a8ef14c29de7d75e907391d79f1074bdae5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body also contains the same lure text and URL, suggesting a social engineering attempt to trick users into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute 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.com/pify?keyword=tremors+2+aftershocks+full+movie+free
    • http://files.annemckeestoryteller.com/uploads/1/3/0/9/130969478/7636690.pdf
    • http://files.veteranchildren.com/uploads/1/3/1/3/131380849/7830874.pdf
    • http://nagasesi.truluckcharms.com/uploads/1/3/2/7/132712615/1198595.pdf
    • http://toladuz.jesstheticsskincare.com/uploads/1/3/0/8/130814328/timawijinifew_risuv_mufuluzoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5388/2280/files/tabiru.pdf
    • https://cdn.shopify.com/s/files/1/0434/0334/6078/files/wukovujofivanij.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/63367859186.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/72085633083.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/39720786721.pdf
    • https://cdn.shopify.com/s/files/1/0434/4374/9029/files/bestand_samenvoegen.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/zarefuratewasiladiguw.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/bsc_mathematics_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/textbook_of_diagnostic_microbiology_mahon_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/fofuwanoraw.pdf
    • https://cdn.shopify.com/s/files/1/0438/2097/4242/files/atm_machine_java_coding.pdf
    • https://cdn.shopify.com/s/files/1/0432/4327/4402/files/95969801128.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056a4.bin
94995b8e4e23987929c2102919051fbf3c4e1ec6acc27b06ce28b8969fc9c32f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A4 5100 bytes
font_01_sfnt_off00006805.bin
080db2705828eeb49cfbc6850f3fdf0bbf3edb233dcebd5214848f47e69922da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6805 10504 bytes
font_02_sfnt_off00008bf5.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF5 4324 bytes

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