Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a740c97306b9cb…

MALICIOUS

PDF

48.8 KB Created: 2020-08-07 05:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aaa6eafbb74e07740f43af9ed3bc8202 SHA-1: b27caa59b0ff3b48846f3c05c924768e3609531b SHA-256: b5a740c97306b9cb553a63560e3d809ab041fecb9ebb7cad6d6f4d08e1f8ecc5
194 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many of which are SEO-optimized and point to a redirector. The primary malicious link, 'https://ttraff.cc/pify?keyword=estimation+and+costing+pdf+by+dutta', is flagged as malicious. The document body, though heavily obfuscated, contains this malicious URL and other benign-looking URLs, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated 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=estimation+and+costing+pdf+by+dutta In PDF document text
    • http://jizexokus.lengbeau.com/uploads/1/3/0/8/130874359/8892108.pdfIn PDF document text
    • http://files.acefiberglasspools.com/uploads/1/3/1/0/131071043/1197571.pdfIn PDF document text
    • http://tevuvaf.lfmssicentre.ca/uploads/1/3/0/7/130739835/9a422e8ba3d.pdfIn PDF document text
    • http://files.tekamahfireandrescue.org/uploads/1/3/1/3/131383924/8771206.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/1/0438/3513/0018/files/hr_round_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/rumijabavujinafujopoxepaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5014/5704/files/nokiriborefone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/wiwenolozaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mubexuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/ielts_listening_recent_actual_test_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6405/6225/files/77583985254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/zupona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3318/8759/files/kedofofusibibaxeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5860/9819/files/91691191317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6255/8874/files/65342353076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/bibojipajavenijiwowi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000684d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x684D 5548 bytes
SHA-256: eed734f1e035258003a89a44b4480a40073c4ae175948151df2693533b1289be
font_01_sfnt_off00007b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1E 2116 bytes
SHA-256: 2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30
font_02_sfnt_off000084ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84EA 15188 bytes
SHA-256: 8f4448efde304b4b4f0e3b9e208bb440072d1f898d1e6a1b4c9942b8d267e907

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