Malicious PDF — malware analysis report

Static analysis result for SHA-256 b276dd0dec7c4a0b…

MALICIOUS

PDF

72.1 KB Created: 2020-08-07 04:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 71a3d6a4e04d72266a510cf0c3ad7abe SHA-1: ec5ea143d8b16287e61e44bee03a513613b5c1de SHA-256: b276dd0dec7c4a0b0907ce5be847bc62ef1de315c1735fd1f330a9bf7dff6f4d
202 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting it is the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for malicious content. The heuristic firings confirm the malicious redirector and the link farm, supporting the conclusion that this is a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=cetoacidosis+diabetica+vs+estado+hiperosmolar+pdf In PDF document text
    • http://files.en.lofos-apartments.com/uploads/1/3/0/8/130813827/c4687.pdfIn PDF document text
    • http://files.kelseysmarina.com/uploads/1/3/0/7/130775498/3c70d.pdfIn PDF document text
    • http://jipakete.lovelifesex.org/uploads/1/3/1/0/131070420/f423c05.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/1/0431/3884/2779/files/4709379777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7510/7992/files/cat_3116_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6262/4405/files/rumetebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/alimentos_para_diabeticos_e_hipertensos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8372/5990/files/gaddis_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3972/7521/files/sezuzapigofolabonozux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0777/8711/files/kasozin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/95813561580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/visowidox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4002/9344/files/36294398913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3956/2645/files/swedish_death_metal_bands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/xowofejon.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 2

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_off0000cf33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF33 5500 bytes
SHA-256: 1ed890095e816c7a30dec6afa203aa0c7e13d4442bdb31201b27bc04b863e369
font_01_sfnt_off0000e1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BD 15368 bytes
SHA-256: a57c8ad15661c5466adbefe386a2cb49ec33460f1de3addf7d2a6a2645db0d77

Open this report in the interactive analyzer, or submit your own file for analysis.