Malicious PDF — malware analysis report

Static analysis result for SHA-256 c439726e4215cbb9…

MALICIOUS

PDF

42.9 KB Created: 2020-08-04 14:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd1310d734a4911bd7a0af260f174c81 SHA-1: 6cf099c7a95afb229b08a4434d2215ae1748e5b9 SHA-256: c439726e4215cbb9f8519f1026aae47603979c3688bf6c1a5f10bc9a8529acc4
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains hosting other PDFs, forming a link farm. One of the primary links, https://ttraff.cc/pify?keyword=3d+max+tutorial+pdf+free+download, is identified as a malicious redirector. This suggests the document's purpose is to lure users into clicking these links, ultimately leading them to malicious content under the guise of a free 3D modeling tutorial download.

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/pify?keyword=3d+max+tutorial+pdf+free+download In PDF document text
    • http://files.davidtarullo.com/uploads/1/3/0/7/130776542/4144777.pdfIn PDF document text
    • http://files.faithbridgeumc.org/uploads/1/3/0/7/130775918/popet.pdfIn PDF document text
    • http://files.peterfosterbooks.com/uploads/1/3/1/6/131607683/lozobenaluri.pdfIn PDF document text
    • http://files.mountainridgecounseling.org/uploads/1/3/0/7/130775848/8e6607.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/1/0431/8117/9048/files/badasewexikusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/89843291962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/tuwinuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/10746152550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32829552166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/jusamezokesonoguxesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/88657309489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/28330850101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/typewriter_font_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/44916610486.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_off00006b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1A 5236 bytes
SHA-256: 14aae22e051fcba628ab5f52fa6203525dbfd527dc9525bc5092508fcc4d47f6
font_01_sfnt_off00007cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEA 9864 bytes
SHA-256: 436dda0cff14e842d124ba6535e52d34310a05c4ae473c08fb337675a3d42cdf

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