Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0ccdc37bd98531…

MALICIOUS

PDF

40.9 KB Created: 2020-08-11 03:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c9fd118c6b753816b3ce78ae623e9e6 SHA-1: 57112319545ce4ba7eec099fae53273a73efa821 SHA-256: aa0ccdc37bd9853123f2507d1a1ef6ccd2bc783b5b84517f4c4c1a5eced40b48
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=tofacitinib+alopecia+areata+pdf'. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on various domains, some of which are flagged as unknown reputation. This suggests a phishing or scam attempt using a medical topic as a lure to redirect users to malicious infrastructure.

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=tofacitinib+alopecia+areata+pdf In PDF document text
    • http://pabut.ftmaagojuryu.com/uploads/1/3/0/7/130775248/bdee39.pdfIn PDF document text
    • http://pusirik.hearttoheartfarm.com/uploads/1/3/1/8/131871721/5391162.pdfIn PDF document text
    • http://toruzelu.yestojesus.net/uploads/1/3/2/3/132303238/6123270.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/1/0427/5588/3175/files/99862971392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6021/3398/files/84651912028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/vimeo_closed_captioning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0624/5534/files/sujesolanulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/tutuzafimebajapovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6844/8151/files/nunoxodikizasivexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/81943826547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/medical_aspects_of_chemical_and_biological_warfare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/82404802681.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_off00006120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 5060 bytes
SHA-256: e57fdff8adb4ae0e6557e8bb4c93bda78a6196864b100884cef915501bcbee27
font_01_sfnt_off0000725a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725A 10816 bytes
SHA-256: 3def648466abbdeffaa097204493330758d5ef62854f3c2a234e8340e9432803

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