Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae554cc0f75c2c46…

MALICIOUS

PDF

74.3 KB Created: 2020-08-18 16:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f865f5cc577ca03a266efbd79dcc453c SHA-1: e55f700e3635453e009dd41d0525cf12c3662611 SHA-256: ae554cc0f75c2c46e08364b43d8d056581a780ed0d3bc2fbdf3f27261177f54a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a large number of external PDF links, suggesting a link farm intended to manipulate search engine results or distribute further malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=mean+value+theorem+worksheet+pdf, which is likely used to redirect users to a malicious site.

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.ru/pify?keyword=mean+value+theorem+worksheet+pdf In PDF document text
    • http://files.brickhouzecollections.com/uploads/1/3/1/3/131383456/187f3ffa64d3cd5.pdfIn PDF document text
    • http://vibewima.gurdainc.org/uploads/1/3/2/8/132814930/dodebapurodo_munurekuwuzamur_zitorejaruzi_lujegibememovu.pdfIn PDF document text
    • http://files.cubscoutpack125pride.com/uploads/1/3/1/3/131379951/vatatofolevojo_vesetolew.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/1/0435/2560/3488/files/terrain_lod_redone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6690/9081/files/laboratory_methods_for_sensory_evaluation_of_food.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/29694527100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5687/4151/files/kagax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1285/7754/files/jisigagusigerodarifep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/29473345420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/bony_to_beastly_workout_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/80262147874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/58432010681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/75116186792.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

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
font_00_sfnt_off0000bf43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF43 5504 bytes
SHA-256: ced820a863023f0b93f360b7eea4e424cddcbf66e9b807c2911d591495919af8
font_01_sfnt_off0000d1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E7 15932 bytes
SHA-256: b5eda3303a91b523475d9e7fa4c145c689d671816ffe2206ae736fcde29283b7
font_02_sfnt_off000103e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 16828 bytes
SHA-256: 9c5ded4f1667a40f19ba07ad12297e74442f8a88baf7f15211b0dc56f6cf2330

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