Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc4d7af596d1219…

MALICIOUS

PDF

39.0 KB Created: 2020-08-28 06:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a46494dcb7e1c15dff667ef67923cff SHA-1: 9d89701422e816c979d5c7a7cb2802142bc37e0e SHA-256: 5fc4d7af596d121963abc3ca794edf7c0fedd16df044a47fa21e38bcc26b2605
194 Risk Score

Malware Insights

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

The PDF contains a deceptive message 'Hf error 68' and numerous links, including a critical redirector link to 'https://ttraff.club/pify?keyword=hf+error+68'. This suggests a phishing or scam attempt, leveraging a link farm to distribute the malicious content. The ML classifier also strongly indicated maliciousness.

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.club/pify?keyword=hf+error+68 In PDF document text
    • http://files.frhsmusical.com/uploads/1/3/2/6/132695416/240020.pdfIn PDF document text
    • http://kosuza.beadsbybrandy.com/uploads/1/3/0/9/130969772/ganobexejesagu.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/1/0431/8828/9694/files/bikizexenewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/6192/9113/files/1001987285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/biochemistry_basics_pogil_extension_questions_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/16838568953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/kitefefururomizekanawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/fufurolawan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/jubaxovuxawijopamuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/juwulizuwixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/8848/7076/files/fopet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/bulk_density_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5349/0074/files/pazukuragunudebutov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8229/3141/files/aspects_score.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_off00005c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C65 4652 bytes
SHA-256: 95543768029d0d3480ae181a9736a8d65382ea4d9a916a9721886069aa13bd7f
font_01_sfnt_off00006c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C45 10368 bytes
SHA-256: 7219c3b3eedafaf597832dcb96663e2296342791e8d30b35f8fcb2fc9e09b5fb

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