Malicious PDF — malware analysis report

Static analysis result for SHA-256 19330bd77f36f56e…

MALICIOUS

PDF

52.8 KB Created: 2020-08-01 21:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bffacc583732ad2499663e3ef52e18de SHA-1: 648bdc3f5c389abbfae524a9e587a5f9e9ae829d SHA-256: 19330bd77f36f56e2d0e9f3cea42776f4162a99c4373cccd5d8ff7a461ad9969
194 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to appear as educational content but ultimately redirect to malicious infrastructure. The primary redirector URL is `https://ttraff.cc/pify?keyword=python+object+oriented+programming+exercises`, which is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other benign-looking Shopify links, suggesting a link farm or SEO poisoning tactic to attract victims. The ML classifier strongly indicates maliciousness.

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=python+object+oriented+programming+exercises In PDF document text
    • http://files.puddlesandrainbows.org/uploads/1/3/1/4/131408209/e4618981.pdfIn PDF document text
    • http://files.soullightcollage.com/uploads/1/3/1/8/131857305/6402669.pdfIn PDF document text
    • http://files.pinegrovecogop.org/uploads/1/3/0/8/130874318/de351d21ce3806f.pdfIn PDF document text
    • http://files.tropicalduckies.com/uploads/1/3/1/0/131070508/4ea6904605e1.pdfIn PDF document text
    • http://files.nodaysoffalthletics.com/uploads/1/3/1/1/131164122/3225b1fc94.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/1/0430/9811/2167/files/tetutopasinibemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/balateje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/wujajarimakasilipifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7469/8912/files/sovazodujuvizebiteburu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/7511922833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7036/5589/files/ropopinetumomanudogovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/tirokel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/86816378359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/11403722180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/74924800761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/neretidesalefadim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2394/8183/files/jefusinutalazod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/12573960155.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_off00007e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E02 5840 bytes
SHA-256: c9c308a322ee560fa0d61911e5f36d0cf817a67f9aad71a84273030fcb5a6afb
font_01_sfnt_off000091c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C7 15836 bytes
SHA-256: 56ef7519217cf7063b6a7de78a97c36bdea6d95a83df87c95e88b016dcee53bc

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