Malicious PDF — malware analysis report

Static analysis result for SHA-256 5503fb911040d8e6…

MALICIOUS

PDF

43.1 KB Created: 2020-08-24 07:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6fcaf20e8440365acbed544c05ea2cb7 SHA-1: 2a1eef92d200dc608b0d4dfa9272c2dda5e5a726 SHA-256: 5503fb911040d8e6331cddb41ed3eaeda154ee535a1e706334177c87d25ef287
202 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is a strong indicator of malicious intent. The document body, though partially corrupted, contains text related to 'charge off' and 'credit report', aligning with the 'SE_INVOICE_LURE' heuristic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=charge+off+show+on+credit+report In PDF document text
    • http://kanofuf.uniontownartclub.org/uploads/1/3/0/7/130739974/c38b0dcec15636.pdfIn PDF document text
    • http://satodorix.wofcca.org/uploads/1/3/1/4/131407406/vifapika.pdfIn PDF document text
    • http://golonavo.ladpp.org.uk/uploads/1/3/2/6/132681556/famexoliduvedij.pdfIn PDF document text
    • http://files.fitbodybyphyl.com/uploads/1/3/1/0/131069875/nopefapigubozupurilu.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/1/0429/8699/5863/files/71304305718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/mean_median_mode_range_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/javamuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3099/4326/files/independent_contractor_agreement_template_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/ganonalijotilozomaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3080/4642/files/pajovenagoxapetowux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/allluia_le_seigneur_rgne.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.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_off00006a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A08 5380 bytes
SHA-256: 83c7d914f67be88c1cc20944f83b603ec4e439672f5c2d77f163c6301c359ccf
font_01_sfnt_off00007c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6D 10364 bytes
SHA-256: c8377bc436434276845caaafa7f7bb675139f042088711a97f602217a63204d4

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