Malicious PDF — malware analysis report

Static analysis result for SHA-256 1627b1a02fdada0a…

MALICIOUS

PDF

40.1 KB Created: 2020-08-22 23:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 797a6270621eb786e55296b2c98d428f SHA-1: fd176547acd7cd290a169a220a8aa02c5adc52db SHA-256: 1627b1a02fdada0af32491e6104fac7a4a61486d7ea09112b48ff986a20b56d0
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'Udacity data engineer nanodegree free' lure, suggesting a phishing or scam attempt. The primary malicious URL identified is https://ttraff.com/pify?keyword=udacity+data+engineer+nanodegree+free, 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.com/pify?keyword=udacity+data+engineer+nanodegree+free In PDF document text
    • http://files.artists-cove.com/uploads/1/3/1/4/131438611/faf4c.pdfIn PDF document text
    • http://vidakobob.guiltfreeclothing.com/uploads/1/3/1/8/131857054/zidabaganu-rigelonuza.pdfIn PDF document text
    • http://bizuvab.katasangkhae.com/uploads/1/3/1/8/131856005/xipajitekijiw.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/1/0434/7016/0032/files/fobom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/10638567422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/riteruxosulibokukaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/24524662360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4298/7422/files/63235197594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/agriculture_in_israel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4196/3679/files/56102676262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0036/3169/files/functional_skills_maths_level_2_past_papers_city_guilds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8773/8533/files/squaring_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8911/5801/files/nuwomibutiwitapeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/program_semester_biologi_sma_kelas_xi_kurikulum_2020.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_off00005f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0C 5072 bytes
SHA-256: 0da5eafc0c416fb67abb868e611d0a17629a499089b39a8692da2a7a40abca24
font_01_sfnt_off00007062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7062 10304 bytes
SHA-256: 0bf5baca58c78143fb2c6852e0c6c07751dd50c4d9293b56cc82c7bc4879fb4b

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