Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ba1f51cf90a6b4…

MALICIOUS

PDF

52.8 KB Created: 2020-08-20 00:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a849d20e43b4c76cdfc1906ca0b8c6c SHA-1: 11dc714280d2e128d63c7eb5bb9cc65ce72dae05 SHA-256: 33ba1f51cf90a6b4d207c60257af0d4a2ecf0167fdb5f76620463dae9b66b281
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and other embedded links, suggesting a primary goal of redirecting users to potentially harmful sites. No scripts were extracted, and the document body's content is largely unreadable, but the heuristic findings strongly indicate a malicious redirection attempt.

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.com/pify?keyword=journal+el+khabar+pdf+22+avril+2019 In PDF document text
    • http://files.givingsquared.com/uploads/1/3/2/6/132681698/8833039.pdfIn PDF document text
    • http://files.phcfamily.org/uploads/1/3/2/7/132710603/9997487.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/1/0430/7045/5965/files/wifejasobivowuzajana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/64152517912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5002/2550/files/panasonic_tv_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5687/3128/files/6228263579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/586222505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9257/3334/files/duxawibax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0088/8483/files/melidukasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/99149099246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/wemot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3323/0488/files/wewegumonofojom.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000993f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x993F 25948 bytes
SHA-256: 7d0340798655a05bae30cdb4acb705821eb4d65ba1f75dbd0ee45cca6de7bd49
font_00_sfnt_off000063ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AD 5688 bytes
SHA-256: f6ac652df571fdc56bc5b71a840b465e61c92ed5dec55914d35d19c43f56b239
font_01_sfnt_off00007702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7702 9992 bytes
SHA-256: 0dc19f11e029fed35298458a47e06794785f0b1774777790d00086f830d371d6

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