Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a871989f44a1ed7…

MALICIOUS

PDF

44.8 KB Created: 2020-08-12 02:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a0b87653bda644c93f1de824ab59af0 SHA-1: 38b662963fc194c55d3343521e4bcedeef35bc65 SHA-256: 7a871989f44a1ed770e9093a42921d425f89d753bfc14bdd9b1f06a3b2c11965
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service known for hosting malicious content. The document body, though heavily obfuscated, includes a URL that appears to be a lure for downloading a PDF, likely a phishing or scam attempt. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

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=leaf+anatomy+of+c3+and+c4+plants+pdf In PDF document text
    • http://lugeduba.jamieathomas.com/uploads/1/3/1/4/131407995/zirinud.pdfIn PDF document text
    • http://files.chaseburgrodandgun.com/uploads/1/3/0/8/130874025/ce5582.pdfIn PDF document text
    • http://files.delloewenthalphotography.com/uploads/1/3/2/6/132696483/datadelomemur_pimavebef.pdfIn PDF document text
    • http://tejinoge.bonezsoft.com/uploads/1/3/1/3/131383657/9240020.pdfIn PDF document text
    • http://files.caritasquilts.com/uploads/1/3/1/4/131437873/mirosuzaju.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/1/0434/3067/4597/files/gipagujunitup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1312/3744/files/british_english_grammar_book_by_ashok_kumar_singh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8104/7965/files/35152836078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5652/8544/files/gudadunir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tebagomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/nolimeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8549/6469/files/tozomefop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5841/1160/files/alginac_injetavel_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/64307243323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0728/5147/files/sejarah_agama_kristen_protestan_di_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/vowigatomofagume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1940/2397/files/sepokogum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/calendario_lunar_menstrual_2020.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 5

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_off00006fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD3 5500 bytes
SHA-256: 90c3f2c8cabab8fbbe417d153da78c9dfaed8087dd8be5f4da7a4017b007b016
font_01_sfnt_off00008290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8290 10376 bytes
SHA-256: 7513a5005b826b4cc8518804cdaec7fbe77151ad2399e2bc7e971df3c6011b66

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