Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ab3e52546fae13…

MALICIOUS

PDF

35.1 KB Created: 2020-08-25 07:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85d35b4613f1d602fb76f11924a8a5a8 SHA-1: d80648fce2dcfad95d144bc4467784c44ecf0035 SHA-256: 47ab3e52546fae1319c4ea71acbe3db3cb338078b0d37ce4336d4abd04dae02b
162 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to a known malicious redirector. The document body, though partially corrupted, contains text referencing 'Soulseek old version' and the malicious URL, suggesting a lure to download potentially unwanted or malicious software. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to host further malicious content.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=soulseek++old+version In PDF document text
    • http://files.regencybydesign.com/uploads/1/3/1/6/131606819/7172871.pdfIn PDF document text
    • http://files.johnrichardsonimages.com/uploads/1/3/0/8/130874124/eef5da.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/1/0429/1962/4870/files/45667491707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/21078867460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2945/5263/files/relative_dating_quiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/79308944041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8447/1719/files/pantera_cemetery_gates_guitar_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8875/6374/files/alcon_rebate_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8078/5823/files/zutubuzazogisezunadulika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/arduino_building_led_and_espionage_projects.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_off00004d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D90 4836 bytes
SHA-256: 272bbd31649308cbc74548736b0e589896ea2cb3394182f47f970b036e92a9b6
font_01_sfnt_off00005e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E12 9888 bytes
SHA-256: f2afa9874c39b552fd42ac76361eaac7398ff50eb18fad2a9d02b56b8bd002fd

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