Malicious PDF — malware analysis report

Static analysis result for SHA-256 874fa105abfa48d9…

MALICIOUS

PDF

47.6 KB Created: 2020-08-15 02:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b4ae87c76f5d512afe4239db7e9dcec0 SHA-1: 9b6a08f0cfeac82ae75bb1fbca530114fa805e3b SHA-256: 874fa105abfa48d9228b3db5ce58e3c55627e1ba21438daffca9a3a04143942c
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at `https://ttraff.com/pify?keyword=chef%2527+s+choice+110+user+manual`. The document body, though heavily obfuscated, contains references to a user manual and the redirector URL, suggesting a lure for phishing or malware delivery. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports malicious intent.

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=chef%2527+s+choice+110+user+manual In PDF document text
    • http://files.flourishinglifesociety.com/uploads/1/3/1/8/131858747/tijabumupuwefi.pdfIn PDF document text
    • http://files.makotokai-karate.de/uploads/1/3/0/7/130776312/mikog.pdfIn PDF document text
    • http://velamif.jadeduo.com/uploads/1/3/0/7/130739678/2809350.pdfIn PDF document text
    • http://files.brookingscountytitle.com/uploads/1/3/2/6/132683070/mapamokugififizi.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/1/0427/3831/9527/files/93537218470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9513/7181/files/cancer_chemotherapy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9849/6412/files/44678174402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/datesheet_of_2nd_semester_private_jammu_university.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7949/8918/files/ensayo_de_logistica_y_cadena_de_suministro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4473/9999/files/career_planning_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/20654956543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/xexitodabigalugevaperug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/derosejudov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2440/1063/files/54169537119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7757/4557/files/ansi_b16._5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4673/0904/files/vofojuvutudeve.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 3

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_off00007a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A13 5256 bytes
SHA-256: 64f54c728684ad85b2eee7964e796c9030063b3934f85920f3a1e13cb969af4f
font_01_sfnt_off00008bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD7 11040 bytes
SHA-256: 8d87de94f0df80f0d83a95f9d6d2ee3496ef62229399e9b15ea9f77162408f0e

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