Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52a7cffacac5c23…

MALICIOUS

PDF

40.8 KB Created: 2020-08-19 23:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d50e8bb2a6b560488f4f9aacb9270fe9 SHA-1: dc57bc2406ac266cba3fd7078f2757cd2e89329f SHA-256: f52a7cffacac5c239dc347360c9c16fb059aed33e2a8c0ab3ae168996ee7fbf5
234 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, specifically pointing to 'ttraff.cc'. This URL is designed to redirect users to other sites, and in this case, it is associated with a keyword related to 'a view from the bridge notes pdf'. The document also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. Another critical heuristic indicates visible command execution instructions, suggesting the potential for LOLBin usage. The primary malicious IOC is the redirector URL, which is likely the initial step in a phishing or malware delivery chain.

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.
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=a+view+from+the+bridge+notes+pdf In PDF document text
    • http://bixivo.icycurls.co.uk/uploads/1/3/2/6/132681670/gobafir.pdfIn PDF document text
    • http://files.guosa-language-tv.com/uploads/1/3/1/4/131437513/kubipesovinibiboso.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/1/0432/6886/6212/files/95435167193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sogogetuxupoxex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/html_index_page.pdfIn macro / runtime command snippet
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/ridepow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7029/1096/files/chinese_to_english_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/bombers_web_series_episodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0247/6190/files/8191057118.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000616f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616F 5492 bytes
SHA-256: 99c87b74d3e8551ec017e89685afbf5edec0769ef9b111d34a77c7d6232e500c
font_01_sfnt_off00007410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7410 10040 bytes
SHA-256: cbcf2306c9863a01f2f6e0f59a787a913be27d608a18a71ceb84394f9b196d92

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