Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d82942bca4a3b96…

MALICIOUS

PDF

99.1 KB Created: 2020-08-10 04:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac27a8a8799f3b8319d350ae1340394c SHA-1: eeb9a0cd67241b14a579be8932fe6f33fbfe387f SHA-256: 5d82942bca4a3b962c3639924fe34b67f7fd87aee707a30ec968af354b59eccd
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that matches the one flagged by the heuristic, suggesting a phishing or redirection attempt. The ML classifier also strongly indicated maliciousness.

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=cowboy+bebop+manga+pdf
    • http://files.taupobiblechurch.org.nz/uploads/1/3/0/7/130739143/7933594.pdf
    • http://files.ritabees.com/uploads/1/3/0/8/130813782/wixobobitutaganugagu.pdf
    • http://files.norcalteachertrainers.com/uploads/1/3/0/8/130873717/nebosiw.pdf
    • http://files.noelanipta.org/uploads/1/3/1/4/131453817/mubevaxetasa.pdf
    • http://files.hustlera.co/uploads/1/3/1/4/131453267/1896899.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/88060234800.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7473/files/12370413614.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/tax_administration_act_1953.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/siguzorisen.pdf
    • https://cdn.shopify.com/s/files/1/0439/8910/6846/files/43234300555.pdf
    • https://cdn.shopify.com/s/files/1/0434/4892/6364/files/guernsey_county_library.pdf
    • https://cdn.shopify.com/s/files/1/0428/9373/8143/files/74460493859.pdf
    • https://cdn.shopify.com/s/files/1/0435/8694/5187/files/60027211557.pdf
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/29468578622.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/77278483322.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/annex_14_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2893/files/intersection_of_line_and_plane.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/monumeb.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
font_00_sfnt_off00011565.bin
5a773c9a1eb8594c1123ed68e51fbdcbe490c3ab95c64cd3be5afbcd8393b2f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11565 13440 bytes
font_01_sfnt_off0001412b.bin
b71951ee989ff6eca34aaa3c0f5f5bed4d97e903cd04240726b4a5fdf6d80a63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1412B 5296 bytes
font_02_sfnt_off00015336.bin
c5d1b7c24aea79524f5b94b9c6e58757517ab855413a913f00acc180087f1cf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15336 13620 bytes

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