Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a6ebf88edb82d8…

MALICIOUS

PDF

54.9 KB Created: 2020-08-11 21:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c3af043fc9f529cff4924132803cbe9d SHA-1: 1dc65e76ff62dca5353eac6302327101cecfec12 SHA-256: f7a6ebf88edb82d854db3ce7aceb1fefc169044cfec5a55bb6920da61972026b
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, suggesting an attempt to direct users to malicious sites. The document body, though heavily obfuscated, contains text related to 'Atresia intestinal en neonatos pdf' and a URL that aligns with the malicious redirector heuristic. The presence of numerous external PDF links, many hosted on cdn.shopify.com, indicates a link farm designed to improve search engine ranking for malicious content or to obscure the true destination. The overall structure and content suggest an advance-fee scam lure.

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=atresia+intestinal+en+neonatos+pdf In PDF document text
    • http://bilaninog.macmccuskerceramics.com/uploads/1/3/1/6/131606289/329e16.pdfIn PDF document text
    • http://files.choubijoudesign.com/uploads/1/3/1/4/131453944/2681255.pdfIn PDF document text
    • http://files.henryleebarbershop.net/uploads/1/3/1/3/131381095/nomofazupumanej.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/1/0435/7623/0046/files/summer_escapes_pool_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3554/2182/files/vatij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/what_is._ds_store_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/vadatogujufikuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0982/5176/files/cables_used_in_networking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bujebunefevefosilipepeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/18784098861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/beowulf_study_guide_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8370/1155/files/23264867480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9456/3221/files/gegesolepazabugimalaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3709/0211/files/17432323882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7857/3475/files/subtraction_with_borrowing_worksheets.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 4

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_off0000991c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x991C 5024 bytes
SHA-256: c6b8783c4462ad3a45c0f00efb3014893c6d5e878c753823bc5a1178e1da8984
font_01_sfnt_off0000aa3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3F 10772 bytes
SHA-256: 35670585bbe24c801eb5f13decdb2f267477f46c202b388cbae52dcde1e81705

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