Malicious PDF — malware analysis report

Static analysis result for SHA-256 611c0a92d0a54181…

MALICIOUS

PDF

41.3 KB Created: 2020-08-12 12:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2325b2ce03bab547836ff0a27f77d026 SHA-1: 503533d89638fc29700980fd9bf16c1978638134 SHA-256: 611c0a92d0a54181da175ac070a7a2f8757e72d993e4dd9d877e2e777f63a561
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many of which point to a redirector service (ttraff.cc) known to host malicious content. The document body, though heavily obfuscated, includes the URL 'https://ttraff.cc/wb?keyword=identifying%20asymptotes%20worksheet', suggesting a lure related to educational materials. The presence of a large number of external PDF links, including those hosted on Shopify, indicates an attempt to create a link farm or distribute further 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.cc/wb?keyword=identifying%20asymptotes%20worksheet In PDF document text
    • http://files.thegorsebush.com/uploads/1/3/0/7/130775520/e23b9573f.pdfIn PDF document text
    • http://bumederi.keeptalkingspeech.com/uploads/1/3/1/4/131453194/xegop.pdfIn PDF document text
    • http://files.freedomfromcancerchallenge.org/uploads/1/3/1/6/131636789/fc4a35f826850.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/1/0435/3448/3616/files/revaxitomosovadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/escala_bristol_heces.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/6851259399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0405/0084/files/sogagir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/53606897772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/7958/5192/files/xurutenurowozimaxitamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4442/1282/files/74069840092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/split_to_single_jpg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/35937112697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8432/0661/files/mumadurixubuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/lolidinujemogudezusot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4999/2860/files/65387124374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3491/8568/files/56690932758.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 4

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_off0000621f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621F 5620 bytes
SHA-256: fbbafa0261986e1f43a15da78f8ab00834949e8ac087d35b2061d158cdd04512
font_01_sfnt_off0000752c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752C 10124 bytes
SHA-256: f4a0e67f083e48b6d85898666567f5c866f7804a4d9afaabf4b30a3681a77b1f

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