Malicious PDF — malware analysis report

Static analysis result for SHA-256 121915bd9a84fbcb…

MALICIOUS

PDF

42.5 KB Created: 2020-08-04 11:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4555d6d80ee4c9d043d38f2bd852867 SHA-1: d858054fed83ec7b0ec9b265fa7040584efe3f3c SHA-256: 121915bd9a84fbcbfcc41fe8e300b5e74d148f8bdc8345ffaffd93bdf058560e
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector and part of an SEO link farm, designed to trick users into downloading content. The primary malicious URL identified is https://ttraff.cc/pify?keyword=australian+english+vs+american+english+pdf, which is used to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains references to this redirector and other URLs that appear to be part of a link farm.

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=australian+english+vs+american+english+pdf In PDF document text
    • http://files.jbmilart.com/uploads/1/3/1/4/131438299/betamin.pdfIn PDF document text
    • http://files.ballaratspine.com.au/uploads/1/3/2/6/132683088/dodimizor.pdfIn PDF document text
    • http://padagenoj.hfnyourvoice.uk/uploads/1/3/0/8/130813765/xifirozovefakosawaje.pdfIn PDF document text
    • http://files.handynola.com/uploads/1/3/0/8/130874086/7186513.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/1/0431/7364/2406/files/puppy_training_for_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0423/9783/files/wunenuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9370/4356/files/gofunovosalodilidameture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/padojelimaxafufadosalud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/sewalux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/43849937345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/59508718724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4902/files/91323889241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6262/3394/files/36639815601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/wekenabidolen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2109/1484/files/86002983935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9769/9992/files/june_2017_algebra_2_regents_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/jeruxizakaninapizemifuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/gepebukolerewafu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6703 5620 bytes
SHA-256: b54c31a638bc305a667e22c1b6124ad91a599d76cf2ec3c9e74ae34f3aad4988
font_01_sfnt_off000079ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79FF 10204 bytes
SHA-256: 822e5ee4ba8925e077b58b38a193906b22b55dcd8079535496ff77d94ff9f5ec