Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4bd3d607df886cd…

MALICIOUS

PDF

44.8 KB Created: 2020-08-25 05:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 208d43734a2815b7d7de064d979503be SHA-1: bf023b733511d7a04d6082b59c173a380df6181a SHA-256: b4bd3d607df886cdb1964a445c8ea45a5ca55d099805072573f5e4fd6d8ff257
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. It also contains a link farm with numerous external PDF links, many hosted on Shopify. The primary malicious URL identified is https://ttraff.cc/pify?keyword=aufgaben+betriebsrat+pdf, which likely serves as a gateway to further malicious content. No scripts were extracted, but the structure suggests a delivery mechanism for malicious content via 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=aufgaben+betriebsrat+pdf In PDF document text
    • http://files.bellacalore.com/uploads/1/3/0/8/130814279/mumubimogamu-fupedevumebat-ropetiwajo.pdfIn PDF document text
    • http://fekod.firstireton.com/uploads/1/3/0/9/130968931/pimekebejunetera.pdfIn PDF document text
    • http://virevus.studioentitas.net/uploads/1/3/1/3/131379951/6595143.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9294/9658/files/88862284518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/devi_bhagavatam_malayalam_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5949/5590/files/fojobexojof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/wesikenimobiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/mitaruvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1087/3750/files/apparel_merchandising_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/83097257447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1559/4399/files/88496650758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/25790087068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/21868205658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5103/8358/files/50416626287.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_off00006368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 5080 bytes
SHA-256: 6c5adc7f4f0607c8eb238cf006a4706f62d9966370b9dcd52bd823f3208d793d
font_01_sfnt_off000074b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 10920 bytes
SHA-256: aef46c8cb7e80cb7ac9ffb1a71fde4746d736b2052da3dc68561b4f14acc23c9
font_02_sfnt_off00009893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9893 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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