Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ab26ad3b0fa037…

MALICIOUS

PDF

55.2 KB Created: 2020-09-02 00:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c4f64812908ca324eeb78c3e56d85bd SHA-1: 75b8881f0b64806f4ac846df6fc773733c55d38d SHA-256: 66ab26ad3b0fa037615212b05902fb75f7f75657e09bc16afe0dd528ee00dfaf
202 Risk Score

Malware Insights

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

The PDF contains embedded links and text suggesting a lure related to financial reports, specifically mentioning 'Quickbooks ar aging report'. The primary malicious indicator is a link to 'ttraff.com', identified as a malicious redirector. This infrastructure is used to host SEO-optimized PDF link farms, likely to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=quickbooks+ar+aging+report+by+invoice+date In 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/1/0430/0118/4417/files/49737393613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/appsc_group_2_previous_papers_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/88616401514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4904/8474/files/wind_erosion_and_deposition_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6430/3522/files/bomazixikes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/ielts_general_speaking_samples_band_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/wupetunoworo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3278/6597/files/briggs_and_straton_engine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3365/6476/files/avancemos_2_textbook_answers.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/238140_9a09cc80ef7d41c984c18679d44a0959.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1fa6dd_19a8f6e4421342a891be9b774b54ccd2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7f4278d71d22471597b283dbeea6eddd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F03 5636 bytes
SHA-256: 6cfc60001da7250d9179995abb2a9084359e9bf4e1732e6118cbe8f1658e11d8
font_01_sfnt_off0000a240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA240 2268 bytes
SHA-256: 7f38c7bd3076d5ec567b373f8788658f617417f44aeaffad1c2d563936ecbb0a
font_02_sfnt_off0000ac50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC50 10436 bytes
SHA-256: e1ac4e70297d4f84bf82daa86d5cf769266edf8456c354d06a33ca6fabeda3d1

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