Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4ff1b5f97a9251…

MALICIOUS

PDF

50.1 KB Created: 2020-08-23 22:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6b600e5241752959d906770d420dead2 SHA-1: b2d505999260dbab2f2615056c0aeda718cc938c SHA-256: ff4ff1b5f97a92510ba878a72a5bcc41992c203433944cc74b86c847e5c46517
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious payload. The document body, though heavily obfuscated, contains the text 'Hydrometer analysis lab report discussion' and the malicious URL, suggesting a social engineering lure. The presence of numerous other links to Shopify-hosted PDFs indicates a link farm strategy, likely to improve SEO for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=hydrometer+analysis+lab+report+discussion In PDF document text
    • http://files.arcir.org/uploads/1/3/1/4/131408142/c3ea75e55b62.pdfIn PDF document text
    • http://files.7240club.com/uploads/1/3/2/6/132695568/pasaxuz.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/1/0433/4351/1703/files/47005452325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/cantina_band_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3066/5637/files/29766323227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1673/2315/files/95383383191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/90766255210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/cheat_for_gta_san_andreas_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3160/8989/files/rofeviwuvusiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/jepigatituwewexagodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7522/3200/files/boworakejererukaxigad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/67135950017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/zogevikamupepojano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8070/3382/files/dolapebomitudof.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 1

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_off000085c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C9 5424 bytes
SHA-256: 842d64cf2d25c065d1d37120bcf93f2111f2e44d1649ebac0272c88940608b30
font_01_sfnt_off0000981e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x981E 10344 bytes
SHA-256: 753c66f870d17c643a0a83fc9fedef1b1709c68f1ef5cbb8e5e9da96246a5307

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