Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc1c449ead4ec8d…

MALICIOUS

PDF

45.6 KB Created: 2020-08-14 16:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6e314c52475ad437ed6ebfc63527e2f SHA-1: b2b33e7735a4559327b812fe98726fdba21a0fd6 SHA-256: dbc1c449ead4ec8de6988c1ae80f33cabb4e159aa92e05f3896e792cab628c20
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on Shopify, suggesting a link farm or SEO manipulation tactic. One of these links, 'https://ttraff.cc/pify?keyword=el+caballo+de+troya+5+pdf', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. 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.cc/pify?keyword=el+caballo+de+troya+5+pdf In PDF document text
    • http://files.sportsindustryacademy.com/uploads/1/3/1/3/131380723/fcffce3e.pdfIn PDF document text
    • http://files.shipasapfreight.com/uploads/1/3/1/0/131071117/1a263.pdfIn PDF document text
    • http://files.smrcreativestudio.com/uploads/1/3/0/7/130776021/vanatojosirax_jufovizej_bonimuzepa_waxizur.pdfIn PDF document text
    • http://files.stlukes.net/uploads/1/3/0/7/130739996/nafaxo_bowogufona.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/1/0438/1586/2434/files/melit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/72983353196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/kiwizufazaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7254/4150/files/archimedes_law.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8872/2587/files/rajugogabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/zidiwej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6353/1933/files/67234391404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/tratamiento_candidiasis_hombre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9633/2705/files/adam_smith_economics_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3197/7370/files/87274269399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/69732935833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/92451968835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6487 4928 bytes
SHA-256: b6e5094adf16064121d3591c228fd61962206f777c43ecdfee6428a12668e702
font_01_sfnt_off00007563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7563 11216 bytes
SHA-256: 1c89ccfa98e81630d2f2e9c420852274ff356439cd5c2d97b484555654422935
font_02_sfnt_off000099f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99F2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f