Malicious PDF — malware analysis report

Static analysis result for SHA-256 283817d83d9d2624…

MALICIOUS

PDF

38.9 KB Created: 2020-08-23 16:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: af29905834de445135a372a65c5a9b97 SHA-1: e697b82cf0347336a6d1a59547bedffbea875c1b SHA-256: 283817d83d9d262451d18fc402ada7f8e8185556a61ac6af40cd32f9592189b1
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious redirector URL and several other PDF links, suggesting a link farm attack designed to lead users to malicious infrastructure.

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=christmas+songs+orchestra+sheet+music In PDF document text
    • http://files.gylrae.co.uk/uploads/1/3/1/4/131406433/wabew-nisojadujukus-gowagubaj.pdfIn PDF document text
    • http://files.margiekorrison.com/uploads/1/3/0/8/130813899/8286774.pdfIn PDF document text
    • http://files.mysmartinspection.com/uploads/1/3/1/4/131409090/lojuzanetorotifa.pdfIn PDF document text
    • http://jirak.pensionplanningsolutions.com/uploads/1/3/1/4/131409508/8e77eb348.pdfIn PDF document text
    • http://files.youthtechnation.org/uploads/1/3/1/4/131408068/c6b00.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/1/0445/6851/0628/files/online_schedule_maker_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/baxavuvepasolavizekufar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/fudepupixezaxuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7154/5237/files/namorado_de_aluguel_grtis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3444/7770/files/chinese_calligraphy_font.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8209/6535/files/centrifugal_pump_experiment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/infinity_to_the_infinity_power.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/96423203735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3476/2664/files/botanical_journal_of_the_linnean_society.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8338/6280/files/javascript_size_of_array.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1161/6418/files/complex_numbers_in_java.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_off00005ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACE 5088 bytes
SHA-256: a89387a0553c5cb1e2639d27794873fafddb358810da06dbb9fe83ae695767f5
font_01_sfnt_off00006bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF1 10144 bytes
SHA-256: eb52f7c86b9b5862005e74af0e31136af4dbb9db065915bb9477046db29946dd

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