Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e18c2b79fcfd81…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 08:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 751ad7eb52d5ef228b5e44a20eb78e5c SHA-1: f362eb39797e807aa6153c3c5792e6c243999b7c SHA-256: 63e18c2b79fcfd81d03e2b56dd2d398600e4774ac890d46189575148729b03b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body also contains a URL that points to a potentially malicious redirector. The ML classifier strongly suggests maliciousness, and the presence of numerous external PDF links indicates a link farm designed to attract traffic.

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=geographical+information+systems+and+science+3rd+edition+pdf
    • http://files.insightofnewengland.com/uploads/1/3/1/4/131437322/6023611.pdf
    • http://files.katiemachain.com/uploads/1/3/1/4/131455283/57a787ca629.pdf
    • http://files.mrcampbellsmathclass.com/uploads/1/3/2/6/132695301/198e45f6a7bb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5490/4997/files/africa_in_world_history_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/34973441476.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/xowutonuzededezolitinot.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/37280394454.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2741/files/ngk_spark_plug_gap_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/4092/4063/files/pdfill_tools_11._0.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5164/files/introduction_to_geographic_information_systems_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/livovekijiwifolu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/antigenicity_vs_immunogenicity.pdf
    • https://cdn.shopify.com/s/files/1/0431/8602/8708/files/tintin_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/18798130429.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/quand_c_est_fini_c_est_fini.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_off00005bc2.bin
8653fd48ebf5bf856d9f8ed88a4b9af9984e26f5605b093604ef5f67a2e5ebe2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC2 5864 bytes
font_01_sfnt_off00006fa2.bin
812f46a30415553e736aaf481ddd12d374032cfc4369f59e66d52efab4946278
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA2 13660 bytes