Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc139364b5b0331…

MALICIOUS

PDF

72.0 KB Created: 2020-08-26 13:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 990b64ada9bf5f1f8c2590a0293d3a42 SHA-1: 96d5212c2303c143598d22adf5eaabc04585961a SHA-256: 6bc139364b5b03313b302ac712ab6631e4013f919c9ddd48baa5bb449678f008
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to improve search engine ranking for malicious sites. This suggests a phishing or scam attempt disguised as a document download.

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=aprender+como+aprender+rosa+maria+ga In PDF document text
    • http://pimatef.tedhowe.com/uploads/1/3/2/6/132681488/6478037.pdfIn PDF document text
    • http://xeket.litupmymind.com/uploads/1/3/0/8/130874153/120412.pdfIn PDF document text
    • http://vuzuliloz.sacredcirclecounseling.com/uploads/1/3/0/7/130738902/mesaturoripuwunugak.pdfIn PDF document text
    • http://files.mrmark.co.uk/uploads/1/3/0/7/130739533/686feec1f1.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/1/0431/3025/7568/files/usps_international_customs_declaration_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/google_academico_libros_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6503/7220/files/equilibrium_constant_and_reaction_quotient_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3070/8125/files/jutekonorupon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/6649/0779/files/ad_blocker_firefox_free_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1905/9868/files/arthritis_deformans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/2411432895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/lirego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6851/8563/files/sodium_carbonate_msds.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7C 5352 bytes
SHA-256: d440fc55d307a8aaef9fb83730bd371db88912214d2976600f6a71c3ad918d9e
font_01_sfnt_off0000d082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD082 13616 bytes
SHA-256: 8b36c3a3f18b9871cf5927a43e8d5fe53dd3bd1808702a2b4519fc993290a1a0
font_02_sfnt_off0000f8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E3 17064 bytes
SHA-256: 00cef1c3be3bfc0c389fb693c7fc6e2bbc6340c832d556a9436dc4a30841531b

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