Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfecba67f546c148…

MALICIOUS

PDF

36.2 KB Created: 2020-08-07 03:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3081d9502641661d399bc94c5cba72e3 SHA-1: b701260a803a215c6dbcfdba6ac3fe3e67690219 SHA-256: dfecba67f546c14844c153a463e331c6abcceb985b5bc9049968402b039218e3
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at `https://ttraff.cc/wb?keyword=unir%20pdf%20gratis%20en%20linea`. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to drive traffic to this malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=unir%20pdf%20gratis%20en%20linea In PDF document text
    • http://files.aitosaudio.com/uploads/1/3/1/3/131384436/1d2f26.pdfIn PDF document text
    • http://files.consultaire.co.za/uploads/1/3/2/3/132302987/9215950.pdfIn PDF document text
    • http://files.dempseyandwindle.com/uploads/1/3/2/6/132681901/lonikomim.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/1/0438/0524/5597/files/80650243924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0484/5465/files/phonics_spelling_grade_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/situjidefixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/35826478250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/hidden_street_maplestory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/vejigimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/34997710873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/sevikojumawuvezuxiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9558/9013/files/84770958509.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 5

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_off00004d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D05 5200 bytes
SHA-256: dceb9a63dee3ad966a4fa31c715506a6485bacd1e8d91d760f1a3875448ca142
font_01_sfnt_off00005ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECB 10980 bytes
SHA-256: e5ad6ce21975f47d8511b54bd9d539c63f6b3870eff11ee3003fa2bedda81955

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