Malicious PDF — malware analysis report

Static analysis result for SHA-256 52c01fe31af6c189…

MALICIOUS

PDF

42.1 KB Created: 2020-08-15 18:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44d0c360a6ef4d7e690b1a0954aba180 SHA-1: 2a7dcf871166c4ac9b2084da20ef1e36d3ec0b86 SHA-256: 52c01fe31af6c189700d34e524588352231fabfdd4132000fdd7f90e429b54e6
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily corrupted, contains the text 'Comprehensive gynecology 7th pdf' and the malicious URL, suggesting a lure to download or view a document. The presence of multiple unknown URLs and the redirector link indicate a malicious intent to direct users to potentially harmful content.

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=comprehensive%20gynecology%207th%20pdf In PDF document text
    • http://mukafu.esqstp.com/uploads/1/3/0/7/130775639/3f666201ba025db.pdfIn PDF document text
    • http://tofema.mccormickqwik.com/uploads/1/3/0/8/130814174/birige_lojiparorozafo_rufigom.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/1/0434/2149/9548/files/incident_reporting_form_kkm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/burijijuribukujari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/lemaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/40048504628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/constituio_do_estado_de_alagoas_atualizada_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7955/5486/files/ruzab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/ford_860_tractor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/balutoduvulibizulirex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3605/2389/files/variable_frequency_drive_working_principle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5823/7333/files/completing_the_square_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/automann_suspension_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/autocad_2020_shortcut_keys_list.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_off00006582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6582 5508 bytes
SHA-256: 42ab85f7ad7c3ad6c4b8f9579af25d71b0f4175a0c5ec58d87de4e708b934f89
font_01_sfnt_off0000782f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782F 10596 bytes
SHA-256: 6ba3b76961f8003678cbf6914f923be95d9e07eef5b212df7d758af80d3f969a

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