Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ea71d0539dbf7a…

MALICIOUS

PDF

41.9 KB Created: 2020-08-03 11:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8edeac62ce9d33218c7b438bc4bdfa30 SHA-1: 3cdef66fb40d0ef5ec40a5661dae5594a50360b9 SHA-256: 88ea71d0539dbf7af109ab4c6dd44a30c7a590573f91325d3d4b2ed5e7444d40
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which point to a redirector service known for hosting malicious content. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a phishing or scam attempt. The ML classifier strongly suggests maliciousness.

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=anaconda+python+tutorial+windows+pdf In PDF document text
    • http://files.esercizi-inglese.com/uploads/1/3/0/7/130776821/a420601e.pdfIn PDF document text
    • http://files.clarinetrepairs.org/uploads/1/3/1/0/131070080/28d25897f0.pdfIn PDF document text
    • http://files.booksforsociety.com/uploads/1/3/1/0/131069961/83ef1b3b.pdfIn PDF document text
    • http://files.devlindesignstudio.com/uploads/1/3/0/8/130874246/ritufuzaw.pdfIn PDF document text
    • http://files.gracehouseministry.com/uploads/1/3/0/7/130775063/50f5e014119.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/1/0433/6294/3127/files/divanowililemaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/youtube_to_mp3_fiber.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/missing_render_texture_extension.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2977/3979/files/molejabowagakojowagemujub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/bukejopojewuxel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4636/2527/files/xutaferibiritogefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/46077408293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/27225275817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/sinaxemitugew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/58247892811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5699/5233/files/rugurulolij.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_off000065ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CA 5424 bytes
SHA-256: 56f51b94d3269fcd95867cc729756fe481be25de7886d217667f4ea953a9be73
font_01_sfnt_off00007853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7853 10036 bytes
SHA-256: d1bec5d45c587047893471c9e0c8ac10ae75e9c68d2ec4c0b591e94dba239a24

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