Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8335e963dd66e65…

MALICIOUS

PDF

39.2 KB Created: 2020-09-12 11:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fa4054e970d799a1cef3569ca31528ed SHA-1: e4856592bc765264f20f5acfc60b285a5860c1f5 SHA-256: b8335e963dd66e6582ce9aa9f2995216c556587cdde7429fbfc4108fdb1e995f
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains this same URL and also references 'living and nonliving things free printable worksheets', indicating a lure. The PDF also contains a mass external link farm heuristic, with many links pointing to Shopify domains, but the primary malicious indicator is the ttraff.club redirector.

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.
  • 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.club/wix?keyword=living+and+nonliving+things+free+printable+worksheets In PDF document text
    • http://files.lighterthanairky.com/uploads/1/3/1/1/131163867/menunepepesowivagu.pdfIn PDF document text
    • http://files.pimpernelwharf.co.uk/uploads/1/3/1/4/131453250/gawavujufek-nufabol-xarin-xusavivok.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/1/0435/5126/0823/files/42248471995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/esmolol_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0114/1657/files/advantages_of_bounded_rationality.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/jegazoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/voridowaxerekigesutuset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9462/files/allied_2016_dual_audio_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3640/2079/files/aplikasi_battery_calibration_apk.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3b47cb_d65c26b3ed0246369ddfb4b6d060be48.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_625f1e9486dd47de80e94b4c554aced1.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 8

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_off00005705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5705 5600 bytes
SHA-256: d877919043569f890f66dbaf3e35975dc1a8a065c899d0c45edd12f57956e0d0
font_01_sfnt_off00006a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A22 10880 bytes
SHA-256: 3b9e3f8b799b34824bd0626dbd265a1b4c8fdcac0fbfdfd75858a652fb3ad2e4

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