Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40d7685bdcc148f…

MALICIOUS

PDF

49.2 KB Created: 2020-08-28 07:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6b2edce92dfaec8ea5142a7919faf84a SHA-1: 587787e8745d2bb8661a7aad457efaf82b5cd12a SHA-256: a40d7685bdcc148fb6ddd22914ba5b0ee1605c072691411833224d9be95a97fd
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to a psychological interview and includes the malicious URL. This suggests a phishing or malware delivery attempt. 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.link/pify?keyword=entrevista+psicologica+ejemplo+escrito In PDF document text
    • http://files.davidteagueentertainment.com/uploads/1/3/0/8/130874224/genodevepe_mazovubaf_xavugoxafilakom.pdfIn PDF document text
    • http://files.weekendinquest.org/uploads/1/3/1/4/131437005/siduzamelofubaf_tiruwedurutu_tadodimomivo_siparexenovewis.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/1/0428/0690/2950/files/19449036274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1573/9304/files/flat_sale_agreement_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/posowikajaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5613/6341/files/29792147970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/new_leaf_redd_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/bejezuxalopafibat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3873/4496/files/xunawirelosowimepasupanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5607/0561/files/popigufan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/balebederimezabobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/the_bedford_reader_13th_edition_free_download.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 3

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_off00007e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E87 5348 bytes
SHA-256: 4aaf847b99a00b21a966da6be8fed58ec6ff3e00aa2ff3533e67847310e1bd83
font_01_sfnt_off000090b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B0 11800 bytes
SHA-256: 6d6d88ec0a5f90ae34c11c7ce3c413bcb7b3a7753cacf7ccdf869d94fe1af08f

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