Malicious PDF — malware analysis report

Static analysis result for SHA-256 855e9a19bd0d8985…

MALICIOUS

PDF

45.3 KB Created: 2020-08-04 01:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d4014744e2e3cd0fa0fcb1db0c1fe25b SHA-1: 580ea0d10d25bfbc6d5abc6a5ca6a8ea99c77ad9 SHA-256: 855e9a19bd0d8985ac1cec45d69e1ec4855e71b7ba3e39d95689186f77fb9ca6
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, `https://ttraff.cc/pify?keyword=oxford+physical+science+grade+10+textbook+pdf+download`. This redirector likely serves as a lure for phishing or malware distribution, disguised as a free textbook download. The presence of a link farm and the ML classifier's high confidence score further support its malicious nature.

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=oxford+physical+science+grade+10+textbook+pdf+download In PDF document text
    • http://files.musicalkitestring.com/uploads/1/3/0/8/130873943/bosowox-motore-tuzalukuduz-wogem.pdfIn PDF document text
    • http://files.inconspicuoushipster.com/uploads/1/3/1/8/131871852/jimekewarimon.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/1/0432/8059/7152/files/papijilafebogagebubunubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/22294429494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8531/4715/files/corpsebloom_risk_of_rain_2.pdfIn PDF document text
    • http://files.pec.us.com/uploads/1/3/0/7/130775458/wuvasovomedidux-kemip-bivenebosa-ripilobadokomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4959/9651/files/microeconomics_hubbard_6th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94215193789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/newokirugixuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/62287738940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/zazizuguzetomosenam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5011/3943/files/centripetal_force_lab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2916/6242/files/shook_me_all_night_long_tablature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/mosanijan.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_off000063c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C4 5892 bytes
SHA-256: ce05f36e40ff46ad75697d110202f55c66178ec2e413b7caea7c50fe07cce7b7
font_01_sfnt_off000077ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77EA 9980 bytes
SHA-256: 0ebab8fcc8d881e1e9a8b7364d9f3f1873decb262681bf75041c7f98a12f4a92
font_02_sfnt_off00009a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A25 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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