Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf5fc0c5547c607…

MALICIOUS

PDF

45.5 KB Created: 2020-09-01 04:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8c4da9eac6a8a77b7ac5c387d9e93a3d SHA-1: b99501aafbe37ddf8bc726cd8e286157b990b334 SHA-256: dbf5fc0c5547c607edbfbcf3aa502f27dd0a579bbf8e668440d3b98ac0371d51
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL https://ttraff.com/wix?keyword=antibiotics+in+early+pregnancy+and+congenital+malformations, which is flagged as malicious. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous other PDF links, likely to obscure the malicious destination and potentially for SEO manipulation. No scripts were extracted from this sample.

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/wix?keyword=antibiotics+in+early+pregnancy+and+congenital+malformations In 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/1/0454/7356/2790/files/navifote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7235/2419/files/17268394757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4778/8450/files/popazunijonaritez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0812/2270/files/95032939930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/luralipelogibemaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3855/3765/files/loxesamipifixowuvedifexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/zuros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0482/8580/files/wamib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6153/5132/files/73748664008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33647917740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/fuzzy_mathematical_programming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9619/2664/files/aptitude_test_questions_and_answers_in_nigeria.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 1

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_off000072a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A6 5708 bytes
SHA-256: 0847bf1afb0d39cb0a7e3cfa0576e39dc2ce4c5912016e431b3f20d00299d3fd
font_01_sfnt_off00008602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8602 10196 bytes
SHA-256: 18252a02e8005f54dace4499da3039da9da692f85807c1c57b8d8708935bd60b

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