Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7a405ed4dde525…

MALICIOUS

PDF

42.4 KB Created: 2020-08-22 01:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b4d5e4c2044368e13438fcc696171a4f SHA-1: 25694267e3960a9eb235aeb451daab5e5c8b0ad9 SHA-256: 7f7a405ed4dde525b3bbb543795f4c4f1a930ad4c399096157c0e4b6de1f3908
214 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains text related to an 'undated cheque' and the malicious URL, suggesting a phishing or scam lure. The presence of embedded links and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to a phishing site.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/pify?keyword=undated+cheque+full+form In PDF document text
    • http://files.cynthiadiggs.com/uploads/1/3/1/4/131409090/fb0091d.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/1/0431/5768/4375/files/63679223264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5526/8518/files/19828116628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/voziwawobupozobak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/free_caterpillar_service_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/fowevikoguzanadujonipejip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1493/0084/files/37305260696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/zefepumad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3051/0758/files/59523616965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/backup_android_apps_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2054/6211/files/keputabijawekukevofogodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/44411371462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1509/3920/files/43720128341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9546/5892/files/vacina_antirrbica_humana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/migufaguzikuteteremo.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_off000067f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F1 5200 bytes
SHA-256: ffba633e23ebe74dff2dda172ea1b0c1849456765356b19486a49484f3b961e3
font_01_sfnt_off00007973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7973 10516 bytes
SHA-256: de4bf7fb0472762131017b49615e2c0f9884fe1660c8b51ddf8332652a6a67da

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