Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c599efa885ad27a…

MALICIOUS

PDF

40.8 KB Created: 2020-08-09 19:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 532ffee53b123eb79fb141f699cba2a6 SHA-1: d9d10db4b7b702e5b94ce85ff7140e789319b5c2 SHA-256: 5c599efa885ad27aefe17796feac31e3f7cd0816d105df608b016a0162d400a6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm designed to appear as legitimate free downloads, but it redirects to malicious infrastructure. The primary redirector URL is https://ttraff.cc/pify?keyword=self+assessment+employee+self+appraisal+answers+examples+pdf, which is known to host malicious content. The document body, though heavily obfuscated, contains similar URLs, reinforcing the phishing and redirection intent.

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=self+assessment+employee+self+appraisal+answers+examples+pdf In PDF document text
    • http://files.audiobooksnz.com/uploads/1/3/1/6/131606260/tuxokolodibidonero.pdfIn PDF document text
    • http://files.smilecommunicationsgroup.com/uploads/1/3/2/6/132681002/vebevemiru.pdfIn PDF document text
    • http://files.danielleposin.com/uploads/1/3/2/6/132682070/nadutebino_jiriwefevev_jofubabiwuwivi_moguwomixupani.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/1/0440/7777/7061/files/sherlock_holmes_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/categorias_aristteles_livro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/sazira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/34483862273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/catalogue_oriflame_juillet_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1315/8565/files/zavawode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/maxutukuwusopedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5091/7269/files/16550618148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/pritzker_prize_winners_and_their_works.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_off000060bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BC 5552 bytes
SHA-256: 1c8cc784eaebed2be007f8c409b9ac8bee3d748b9449638a7ac9aea60690d4ea
font_01_sfnt_off000073a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A7 10084 bytes
SHA-256: 3db65fe97c587c89fc6d6dcc752138a931b6be23704123c5b558a8f41b3fc569

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