Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ba28d542508470…

MALICIOUS

PDF

35.7 KB Created: 2020-08-12 00:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9c4481f1069b8bd460dbc9f42cffb474 SHA-1: 1154e2cc355b948809b0bf91f3ab6d087bb2c71b SHA-256: 61ba28d542508470280e741fd075d82e755e89fe518013e2924e0c5bd101cd5c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, masquerading as search results for a popular book, that point to a malicious redirector. This redirector likely serves as a gateway to further malicious content or exploits. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector URL reinforces this assessment.

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=wings+of+fire+book+6+pdf+free In PDF document text
    • http://files.gravitysuccess.com/uploads/1/3/1/4/131437756/6258607.pdfIn PDF document text
    • http://files.getbackpainfree.com/uploads/1/3/1/4/131452981/jekemejiw.pdfIn PDF document text
    • http://files.nakaishatolbertbanks.com/uploads/1/3/1/8/131857315/zitigotowoxeluvife.pdfIn PDF document text
    • http://files.lrba.ca/uploads/1/3/1/8/131860645/f18cf752ed.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/1/0439/1659/1272/files/analog_to_digital_converter_ic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/25654224253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/222383682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6831/0172/files/73365155578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4991/7347/files/stihl_ms_170_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5815/1070/files/habitos_alimentarios_tesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23631451812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/kuwixokixetamewamavuso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/supalinemonizudipam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9570/3204/files/team_win_recovery_project_galaxy_s3.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 8

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_off0000493b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x493B 5336 bytes
SHA-256: 07a710a2891c5ebcb6d2cd33a4e9359648735595d0f7cc856991afecbd2b2bfe
font_01_sfnt_off00005b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7D 11368 bytes
SHA-256: 36f500db8b5136deefee656bd545f25c06fee8b81ccb5d68da78f08a065f4f32

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