Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc79ed714e28b39…

MALICIOUS

PDF

46.1 KB Created: 2020-08-20 03:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ef23577654cc940db6d4f77f2e6bac8 SHA-1: c0a2546f18c53b6eaf9d19fba481d1c0055866f6 SHA-256: 6fc79ed714e28b391cc12232f40045c8c2120abb0627fb0d39a4356bb5b57cf6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, includes the primary malicious URL and appears to be designed as a lure, possibly for phishing or to download further malware. The ML classifier strongly indicates maliciousness, and the presence of a redirector link confirms a malicious intent to direct users to harmful 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.ru/pify?keyword=referencias+bibliograficas+de+internet+formato+apa In PDF document text
    • http://files.abspate.com/uploads/1/3/0/8/130814534/8842399.pdfIn PDF document text
    • http://files.trevoultersouthdevons.com/uploads/1/3/0/8/130814208/vefejofewimupunilug.pdfIn PDF document text
    • http://dotap.emmaskline.com/uploads/1/3/0/7/130739615/vepese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3669/6995/files/amhran_na_bhfiann_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4782/8118/files/metabolisme_karbohidrat_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4474/1024/files/83639329159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5190/8249/files/percy_jackson_the_sea_of_monsters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/tufulurasuguwip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1184/9892/files/dnd_5e_monster_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/44294508039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/xerufop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8015/4269/files/73533881824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6303/1448/files/borders_railway_map.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 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6444 5408 bytes
SHA-256: 7f17de7e678f6b52e8ff4b9642dc1c656648079055c3e96f3014a6476a7e9690
font_01_sfnt_off00007683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7683 11312 bytes
SHA-256: 7700dc2a1afd816f43d55548bfa2e22081fbb47235dfda16b577c0e2bfb53698
font_02_sfnt_off00009b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B82 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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