Malicious PDF — malware analysis report

Static analysis result for SHA-256 f821bf0bbf652ca7…

MALICIOUS

PDF

110.4 KB Created: 2020-07-28 08:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 45e147ebf8f366a094967925620b2fd7 SHA-1: 6e63cc7d1570462a0032d995ea33db7d11330433 SHA-256: f821bf0bbf652ca793a11595adb57c04ce09fb857ab7cf7ec5c869b19dbc616a
234 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This indicates an attempt to redirect users to potentially harmful content. Additionally, a PDF SEO link farm heuristic was triggered, suggesting the document is part of a larger scheme to generate traffic or distribute malicious links. The document body, though heavily obfuscated, contains text related to medical guidelines, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=chest+guidelines+anticoagulation+for+atrial+fibrillation In PDF document text
    • http://files.swimpristine.ca/uploads/1/3/1/3/131380619/6d7962e2d.pdfIn PDF document text
    • http://files.wesleytbrown.com/uploads/1/3/0/8/130813860/e04440f9a9e7.pdfIn PDF document text
    • http://files.lezcycles.com/uploads/1/3/1/3/131379554/sibeti-jomopoxowaj-fojogiku.pdfIn PDF document text
    • http://files.supernaturalentertamitedproductions.org/uploads/1/3/1/4/131455883/visemomitowezij-fezaweku-xevut-kixivim.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/1/0441/4016/7320/files/ribapegividupofewezup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/sagomubinudotafawijamopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/tuwabonepiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5609/5644/files/lugojatozutadaxoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/17114745817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1425/7820/files/1075909121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/62006759428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/55806859186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0248/6180/files/37981902118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/67239086060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/rarazaluga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/64657162706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/kodomirasovewam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/47247601930.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000175f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175F5 5328 bytes
SHA-256: 916e6e33fddd07f79f3a8ae274ced2c65e6efd39a130bce8d975ee7d9cd5fc27
font_01_sfnt_off00018804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18804 10396 bytes
SHA-256: eb8fddc6d9100302834b9ab0c7cd5faf22077404df23ceeb374fcf926da3e6a2