Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac1fbbd7216c5a11…

MALICIOUS

PDF

41.5 KB Created: 2020-08-16 23:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a49c991443f43ccf44a5b34bca12d30 SHA-1: c6dfacb82429f30c446344aeebd1f69eba4e115f SHA-256: ac1fbbd7216c5a11f4c8dd9b4aef0e3a43708ba00f90fa87b503924f21c96cad
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a primary link pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to an 'open day' event, suggesting a lure to entice users to click the malicious link. The presence of a link farm further supports the malicious intent of redirecting users to potentially harmful sites.

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=canford+school+sixth+form+open+day In PDF document text
    • http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdfIn PDF document text
    • http://files.campervantoursuk.com/uploads/1/3/0/9/130969231/naken_lagurovipuz.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/1/0429/7133/2767/files/3162056849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6764/9698/files/java_1._8_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/21746012300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0253/4822/files/asmaul_husna_arab_dan_latin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/tatikudulezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/75467466025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/firubajipanobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/lavetukutowuwupive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3872/8611/files/doxuzikimijefafiruza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/68545090756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3749/8271/files/8434770670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3146/8951/files/moment_generating_function_of_negative_binomial_distribution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/47739117408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/4171/2286/files/bhagavad_gita_slokas_in_telugu_download.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_off000062d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 5468 bytes
SHA-256: 565cb02fc8d605d0327735903eb4f7bd6c9bb511240b5d8b75dd1b83ff6c9239
font_01_sfnt_off0000754b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754B 10464 bytes
SHA-256: 26391122244de43260af38571916ee28ca7de605ef64aaba5bc303ad8a38881d

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