Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fa8c023440e31b…

MALICIOUS

PDF

33.8 KB Created: 2020-08-07 15:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00eea57f1f03addf4b43004459c0cac5 SHA-1: f5a36069504d7f859fb1ca0adc4ede6a872e1214 SHA-256: 73fa8c023440e31b69e6c6ff9f4d3cdf2d5a695c9ff671728cca246daad4a576
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to a redirector service, which is a common tactic for phishing and malware distribution. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports this. The primary IOC is the redirector URL, which likely leads to a malicious payload or phishing page.

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=calgary+bus+map+pdf In PDF document text
    • http://files.artistscoalitionforevents.com/uploads/1/3/1/4/131407901/pejafi.pdfIn PDF document text
    • http://files.monicasayers.com/uploads/1/3/1/0/131069987/besesosojodobidawit.pdfIn PDF document text
    • http://files.functionalhealthcoach.com.au/uploads/1/3/2/6/132681836/2a4ad.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/1/0435/3179/6634/files/juvet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/windows_7_pro_oa_hp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/wufasomejoziviri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/oakland_athletics_2020_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5928/1048/files/gavobelam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76106621034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/zebelutozuful.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/makanesosesenab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/vesap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3486/4798/files/kiro_7_weather.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/sabul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8509/3281/files/51063710467.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 7

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_off000046eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46EB 5508 bytes
SHA-256: dd814a6a7f8499aca48dcd0f76a489b8125c2b98731826af3362a08d38bf344d
font_01_sfnt_off0000598b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x598B 9684 bytes
SHA-256: 100f8cba681eb631141ad87a794211fac3f41deb0f68b0c6a9ef48331782fc3a

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