Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90730b574473860…

MALICIOUS

PDF

51.5 KB Created: 2020-08-22 20:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 335d734f971ef17d2ffdea87f7f93ec2 SHA-1: df9039b9397f9e979251014a4ff80ca5dc6dc2ca SHA-256: f90730b5744738600eefad0117e68797404d5bb62b56870c4547bfd226c59359
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'contacts backup apk android' and includes the malicious URL. This suggests a phishing attempt to trick users into downloading potentially harmful software or visiting malicious 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=contacts+backup+apk+android In PDF document text
    • http://files.triangleentertainmentagency.com/uploads/1/3/2/6/132681342/pesavaxukite.pdfIn PDF document text
    • http://files.c3churchnorthcity.com/uploads/1/3/0/7/130775665/17dbe094a5b4e.pdfIn PDF document text
    • http://finulaluw.bergonawire.com/uploads/1/3/1/4/131407067/rawonebod.pdfIn PDF document text
    • http://wemij.arizonanativeexperience.com/uploads/1/3/1/4/131412032/womedufifitexev.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/1/0428/7869/7631/files/xazajeku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/60261045260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9430/2115/files/active_and_passive_voice_worksheets_for_grade_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/28427075430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/rejenalosewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/5640620137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5319/5162/files/enfold_template_wordpress.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8295/6443/files/jomuvifer.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 6

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_off000086a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A6 5144 bytes
SHA-256: 4061629daa93917ef50e896290dccb8bfc2673ae728a3fe509156def9b6c489d
font_01_sfnt_off00009828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9828 12636 bytes
SHA-256: d1eed1531a62552e963ddd0b5b072a366683440cd59e10e0f62fbe186919faf6

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