Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ec455e8a237f68…

MALICIOUS

PDF

55.5 KB Created: 2020-08-23 22:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d9a411fbd939e5e360fe35422438d02 SHA-1: 74f7ba9d4ff2a154e1bc5d3f40fbe1d5cdee3a30 SHA-256: 75ec455e8a237f6865232252211b81a3b2e43b8bfeae658bf14bb15a8273511c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The embedded document body, though heavily obfuscated, contains a URL that points to a known malicious redirector. This suggests the document is part of a phishing or scam campaign, likely using a 'free download' lure to direct users to malicious infrastructure.

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=someone+like+you+piano+sheet+music+pdf In PDF document text
    • http://files.oportunityisknocking.com/uploads/1/3/2/7/132740204/mokogagewutizir_japupitimolugob_jazepedumefuta_mulesagubelek.pdfIn PDF document text
    • http://files.lotuspadyoga.com/uploads/1/3/0/9/130969548/acfcef9e5347f.pdfIn PDF document text
    • http://tufup.mysideofthecouch.com/uploads/1/3/0/8/130814161/2ced0a0e30822c.pdfIn PDF document text
    • http://files.learninginafterschool.org/uploads/1/3/0/7/130738859/wabixepujubafixolaki.pdfIn PDF document text
    • http://vobux.imjustkee.com/uploads/1/3/0/8/130874284/9676306.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/1/0428/8220/3801/files/63825733658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/ccna_voice_instructor_lab_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/1346948606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/smash_bros_melee_pc_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/87349739857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8669/0969/files/4645860319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/22995921362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2726/5693/files/bazuzidixafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5280/files/46321226838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4690/3701/files/venugujerusefopuza.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off000082dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DC 5568 bytes
SHA-256: 1ad5e9aa1c83e8748a00d98c04bc2c69779fef8b53e57222406f55bd45cf1dee
font_01_sfnt_off000095a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95A8 10492 bytes
SHA-256: bdc701b3e2b491c61084721264da29acefe3f988883e1a50ebd279e851d7aab6
font_02_sfnt_off0000b9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DD 16100 bytes
SHA-256: dbe3dd64dc066f428802739f18684eaf08c446fcda8cbe88d420f1ef9ee6b29b

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