Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ef53278207aed3…

MALICIOUS

PDF

37.1 KB Created: 2020-08-08 09:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 82415d8bbb3deeefc5a8f51f47354742 SHA-1: b349e58859d62a41e6ba7816826a364890e459c0 SHA-256: 78ef53278207aed31bd86dc3fc3a598b041b59720be5be362ef6a4794c174d2c
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains text suggesting a lure for a 'service manual' which likely leads to a phishing or malware download site. The ML classifier strongly indicates 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/wb?keyword=nakamichi%20soundspace%208%20service%20manual In PDF document text
    • http://files.imaf-americas.org/uploads/1/3/1/8/131858287/libaxid.pdfIn PDF document text
    • http://files.videopeople360.com/uploads/1/3/1/3/131380547/jatiwufomixivepeguk.pdfIn PDF document text
    • http://bovuvig.cantonhighschoolgolf.com/uploads/1/3/0/8/130814788/luvorefazik-vegowel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/alice_24_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/albinismo_scielo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/18050102375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3604/7525/files/77017049355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6371/3695/files/dunopekozaxadasigafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/wexifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2307/2412/files/vulujezovapusoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/28154524494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8168/6437/files/17236957685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5992/7448/files/guxadetunilaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/17726121972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/tejege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4694/4416/files/tajabisuputuvorekimezige.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4572 5404 bytes
SHA-256: c8404c2292e2730475e2c73f1115061dc39ec1e5ae4fe1ce94d456e27bcbde83
font_01_sfnt_off000057a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57A2 10180 bytes
SHA-256: db6823aa588ac1828a2573f1f23189944e93c72e96b1d9c63eac6539c4692bca
font_02_sfnt_off00007969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7969 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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