Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4cf234b7d65b39…

MALICIOUS

PDF

47.2 KB Created: 2020-08-12 02:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8b87c2537564578d466c354d463b989 SHA-1: b176b01ccef22fd647ca5605c1d5037dd8d7df55 SHA-256: 6c4cf234b7d65b398f17aeb9e086b17f6ecf1bf5b9435a1714213653d65a1b97
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. This suggests a link farm or SEO poisoning tactic to lure users to malicious content. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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=orthographic+drawing+exercises+pdf In PDF document text
    • http://muxamigak.vickysahlin.com/uploads/1/3/1/3/131380005/tiwogipekirojukuragi.pdfIn PDF document text
    • http://files.c3la.org/uploads/1/3/1/3/131398333/mevopesog-jovozujezamexal.pdfIn PDF document text
    • http://files.emmashugs.com/uploads/1/3/1/3/131379832/zajaxidorilekuver.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/1/0433/2666/8952/files/60033056784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/gulixosoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/fadoludad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/poxabuwewogifejujiwez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1438/8892/files/zofuwusukitadijelukovota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5357/2515/files/28047495939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/57791400610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0725/4439/files/deep_and_dark_and_dangerous.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/23612723954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/fepureri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7840/2723/files/xoxebinarenexezopelade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/converter_to_word_nitro_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/muralexeboxirijuga.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_off000078dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DC 5572 bytes
SHA-256: e1334c6de64d03397d8aabb056b8e282a91920e2f0a940a93964c4d2f4aa95af
font_01_sfnt_off00008be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE0 10780 bytes
SHA-256: 1ad63804af3629bd6982c862cac116a0a9f49dd07fb0ff84fd4169c3522f5e0c

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