Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6b2248865015e3…

MALICIOUS

PDF

38.0 KB Created: 2020-08-04 21:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f6282f6c0d3890399a354f2565893ca SHA-1: 646189956d7880ad5e4328266fb2130268d9c5b4 SHA-256: bb6b2248865015e342dc44183cc9a8ea966350f79e729fdde597ab1ace3387f7
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. It also exhibits a PDF link farm heuristic, indicating a large number of outbound links, many hosted on Shopify. The document body, though heavily obfuscated, contains the URL and text related to 'irregular verbs exercises advanced pdf', suggesting a lure. The primary malicious IOC is the redirector URL.

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.ru/wb?keyword=irregular%20verbs%20exercises%20advanced%20pdf In PDF document text
    • http://files.stonehillkennels.com/uploads/1/3/2/6/132681698/javisonasajifijorilo.pdfIn PDF document text
    • http://suwad.tigermushroomfarms.com/uploads/1/3/0/8/130814921/21bb438cd42.pdfIn PDF document text
    • http://files.brookesummers.blog/uploads/1/3/0/9/130968996/zolanax.pdfIn PDF document text
    • http://files.seancotton.com/uploads/1/3/2/6/132683088/a819c.pdfIn PDF document text
    • http://files.kbassokinesiology.com/uploads/1/3/1/4/131437418/84af0ebff.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/1/0439/8622/3262/files/vuzojogoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/bugunidomad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6158/2755/files/jokewetoloridomuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0497/6548/files/vibomurekowinokenojenabim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/gary_auto_clicker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6345/9486/files/wovoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/62803234146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/sobufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/bovupikikiwojexowusosoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7418/2563/files/kuvozebin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/jeguxulufamabab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/85619344636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7792/5019/files/kiximofeviveruz.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_off000054d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D9 5528 bytes
SHA-256: 0684cc55dbb7ea36a716d5ad2645963df4189e8227bb7a317befac9b1b02f327
font_01_sfnt_off000067bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BD 10320 bytes
SHA-256: 663fb41942d1038e4b7d8637ed49023bd614d3a626c7fe3fbc785e1feeb1b8d0

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