Malicious PDF — malware analysis report

Static analysis result for SHA-256 013cfbc103ccea32…

MALICIOUS

PDF

55.2 KB Created: 2020-08-08 20:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 920b8a42bd35a4ae3bbac8be294a4452 SHA-1: 4b9b9dc5668f33af19d369c09763fa796a3708f7 SHA-256: 013cfbc103ccea32fc46d9c1ca368879a131146378f3f23c4817abc70c8d502a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service that is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, disguised as a schedule. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content widely.

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=az+cardinals+schedule+2020+pdf In PDF document text
    • http://files.directoverheaddoors.com/uploads/1/3/1/8/131856188/4dbde744636.pdfIn PDF document text
    • http://zabijuti.quiddityphotography.com/uploads/1/3/2/7/132710712/wurazuzetuwisi-nusobubifab-kugotezoxuku.pdfIn PDF document text
    • http://files.carnegieartcornerstones.com/uploads/1/3/1/0/131070576/jafixusixi-sudilitotuxox-kovegatuteg-mewezoxowoxa.pdfIn PDF document text
    • http://pexovuw.weddingproct.com/uploads/1/3/0/9/130969352/gafuxoxun_bovopake_ludopepiriza_rekiko.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/1/0433/1143/1838/files/zepimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugerivedisabuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/zazokufidozij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/painter_essentials_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3871/6583/files/agenda_setting_and_problem_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/wonky_donkey_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/biology_sylvia_mader_11th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/67518524192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6445/4294/files/azure_information_protection_step_by_step.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7663/9134/files/tululozeganil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5319/5162/files/popigekigapegolam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/16945513991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/5794/1402/files/abby_pollock_workout_plan.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 2

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_off000099b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B0 5556 bytes
SHA-256: 09cfe90eb7f8ed0dae7dda014d0c3b3874d66b6aaf88c06374160f1274d3ffd2
font_01_sfnt_off0000ac98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC98 10364 bytes
SHA-256: ba1e45d486ef8e40381d20afb52af0ee5dbbe0b866e79b87ed129e412f6658f5

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