Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c08ef19edbf743…

MALICIOUS

PDF

47.4 KB Created: 2020-08-18 20:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdbf9505fecba01d23443f645c5348cf SHA-1: 59eda23672363b2602501c594ebb6f6d3387437f SHA-256: 65c08ef19edbf743ec246ea7b9f97b34b86e46bf42fc31b8e58a5da409616458
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though partially corrupted, includes the same URL, suggesting an attempt to trick users into visiting it. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic. No scripts were extracted, but the primary malicious activity observed is the redirection to a harmful URL.

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=chirru+kannada+movie+songs
    • http://files.canadianwatertechnologies.com/uploads/1/3/1/1/131163635/kapiwafim.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/15839570220.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/nigiruzokekuwuparajax.pdf
    • https://cdn.shopify.com/s/files/1/0430/8975/6311/files/good_anime_wallpapers_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5896/files/bca_4th_sem_math_notes.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/anthropometric_measurements_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0438/2402/1664/files/98562845221.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/keltron_capacitor_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/87394227062.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5261/files/identity_property_of_multiplication_common_core_sheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00007dc3.bin
4f4cefd0b9e02f30be180f7a3e050a103de860888fd17b5c4b6a6cdf3b69ed13
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7DC3 1984 bytes
font_00_sfnt_off00006c1c.bin
2369f74b02fdb21f743c4210d12535383bf11e00164f99c9873b0f5550e42418
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1C 5236 bytes
font_02_sfnt_off00008776.bin
2d4dd01313418b0ad1af46c70764d77258da6c356ab52b27c7c7fad2a80dd376
pdf-font-stream PDF embedded font (sfnt) at offset 0x8776 12868 bytes