Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fcecf86f9d964f…

MALICIOUS

PDF

68.7 KB Created: 2020-08-29 23:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 39e6c720552d22f22527be10e0175624 SHA-1: 7b4598a5f99da033c752f4539336abb8b6114dd4 SHA-256: 97fcecf86f9d964f15cab9861576d6e32fe1c7bff72753c76d33702688aa1042
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=xxx+video+pnjabi+18+vrsaca'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure for adult content, likely a pretext for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=xxx+video+pnjabi+18+vrsaca In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_29a7fe3bc7af4bcd967d8bfe3dc4be32.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e2d2d1ebdadc40988c370930e0a12958.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_bdd1c61c72af4b8b9397ec9026c61704.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fa60f998f3ca46a0a3a5118adb8edc6e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2c8d66_0e372d5efc604c2ba940d974d0a396b4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_89ba8acef18a416eab540a220f16fe61.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6102768d76804396873798d0d77a7a9f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b07cb329512d4054949d76341b293a75.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e7dec993685842a59996048e02d31b77.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0049ca_247b08002e3a455c84537765fa116c0a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/934fc3_89076706df21469bba366ca61bb03986.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a6e5e9_bd4bc95cf9a84b7c9e58d56fbf2ea4fe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9236d82bb33a4faeb3b015bf5656cb6c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3b7182_495cd09a3ca4420694c557dc26b83136.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AC 3776 bytes
SHA-256: 2cc534cd89b000e6228a2f2e8756cdaf587df437ab7ce458b7dcffe8f0b4917c
font_01_sfnt_off0000763a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763A 5604 bytes
SHA-256: d7d336998be866e7c80fb6c0e44d0d0e0e49f973317eed1680f623d1717635ef
font_02_sfnt_off0000894f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x894F 6572 bytes
SHA-256: fa8c11f72cde75943c37e0aee73cbacf520abff1186e5a59f98fdfe34235980a
font_03_sfnt_off00009da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA3 6148 bytes
SHA-256: 0b8363bc9e07cf89205331d27bc1c31e4fc91592bb846ce71245372e642e4983
font_04_sfnt_off0000ad83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD83 11264 bytes
SHA-256: 64a70414abd10f6ff3f341c5095a29b00111670ae946b346ba98eb113caacf62
font_05_sfnt_off0000d3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C0 16684 bytes
SHA-256: d2dbedc23249eed12779007d0c58b566766b7d8fb5b0bb1d603b2aa598fde09e
font_06_sfnt_off0000eb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1A 7436 bytes
SHA-256: 9d7e7591c12e1f41efa5cc0e4aedfd38b6a08e1a105f6078ac48e429ee38013c