Malicious PDF — malware analysis report

Static analysis result for SHA-256 18fb9c48aa87dcf5…

MALICIOUS

PDF

69.4 KB Created: 2020-08-18 20:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6aec8d09af38f9eb66c63cedc499130c SHA-1: 21e3cfee1ef908c69ff7eb3b23c0f30c4e91d5d7 SHA-256: 18fb9c48aa87dcf5868e4a7381c15281e7ecdbb2fe20e949e9d9a3bb34811c69
194 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL is 'https://ttraff.cc/pify?keyword=definition+of+contemplated', which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, suggesting a link farm designed to drive traffic to malicious destinations. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.cc/pify?keyword=definition+of+contemplated In PDF document text
    • http://files.rockfishdesigns.com/uploads/1/3/1/4/131483143/f6536d19.pdfIn PDF document text
    • http://files.jonathancaverley.com/uploads/1/3/0/9/130969993/wibivev.pdfIn PDF document text
    • http://files.pageantsbymindy.com/uploads/1/3/1/4/131438058/8f531821.pdfIn 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://cdn.shopify.com/s/files/1/0438/5511/8501/files/najagewokubuwigav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1664/0917/files/jojesiseji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2204/0731/files/minutedolosivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/stardew_valley_spring_crops_bundle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/zizowugebuwakiporu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1068/6113/files/94025522623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8561/0651/files/auditoria_financiera_forense.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/pofiwewiluvamizumoj.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off0000dc64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDC64 18208 bytes
SHA-256: a868505805417e849af2ad8dfacb1330300bc342d4366d77d1e20aab43efe757
font_00_sfnt_off00005b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B52 5588 bytes
SHA-256: 40ed7a59e93a39a2357a6714e82246a7d8382393c541a7d084f33d2bd6126fa4
font_01_sfnt_off00006ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE2 5024 bytes
SHA-256: 37576cdbd6903e9668eb54b51f8e326fb9ff655306f3a4b4737bdf5f334043a2
font_02_sfnt_off00007fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE7 2656 bytes
SHA-256: c206ac4eca120f096112d408dff6b33a2f721090936d80486df636e1cd240fde
font_03_sfnt_off00008aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AED 2328 bytes
SHA-256: 3702365b3034b9d7945da23b991b5e2ac3f8bb06d1ba3be7e5ba1b5d8dd48c9f
font_04_sfnt_off000095a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95A4 2108 bytes
SHA-256: e66bd646ff29f48b94a898642357a1d5295b77faffa0bd70eb77acb4aebc9a97
font_05_sfnt_off00009f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F70 6640 bytes
SHA-256: eca62b72654736461a635ba366d09d794777fd95c58152d2b251becdfce657e0
font_06_sfnt_off0000b10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB10D 12964 bytes
SHA-256: a2f12002f5462bcf544cf42c54dc00fa2fd9c448a6c24b19d5c1e15214327376
font_08_sfnt_off0000f955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 3276 bytes
SHA-256: 51c1d5fa29146058fbc649eac7766b85490f6942bd67486bd14cc46e9087474c