Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b1806d395a9aca…

MALICIOUS

PDF

50.3 KB Created: 2020-07-28 04:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6964c0b71dcbe8d1f8af598ea58ea643 SHA-1: c4dd1cbfcd93532a086033c493b6a41c80b78adf SHA-256: 12b1806d395a9aca4653eb5940737df5bc3427f500d75d26069055f5b10aaad5
210 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure (ttraff.cc). Heuristics indicate a browser installation lure and a link farm, suggesting a social engineering attempt to trick the user into downloading a malicious file. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=brave+browser++exe In PDF document text
    • http://files.nellkoopmanart.com/uploads/1/3/1/4/131482826/a242aafcc7b156.pdfIn PDF document text
    • http://files.railproductions.com/uploads/1/3/1/8/131856433/butonogox-tejuweve-xusezozasevasaz.pdfIn PDF document text
    • http://files.acsnutritionfitness.com.au/uploads/1/3/1/3/131379615/pidirudoxutal_fidivegedewiwo_bijesagoxid_fanowago.pdfIn PDF document text
    • http://files.ellenhanley.com/uploads/1/3/1/4/131437593/2051962.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/27116221673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6076/3555/files/48219388942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8120/2854/files/kojitirinekebomutoxurakex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/87859644801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/51093519451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/rokosezidifasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/82894148773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6951/9510/files/66597874503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8351/4527/files/86547764333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/towiduligowiwuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/60949148480.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7352 4612 bytes
SHA-256: e41c87253a75b1d334282925273d8bb3c759220a0c75c27bd1ded9522186a6e6
font_01_sfnt_off00008314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8314 10656 bytes
SHA-256: a375060e3e370fdd84544adc974c94f23f922328910d86324db3e8b7cf9a48dc
font_02_sfnt_off0000a72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA72F 16112 bytes
SHA-256: 275d0ef8f619a30f75d5b67021c85ffe51dbf44d82a44ecb2d07128ff93f9399