Malicious PDF — malware analysis report

Static analysis result for SHA-256 815d4d6a85abdab3…

MALICIOUS

PDF

39.5 KB Created: 2020-08-20 00:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4930fdd3f92a10261c6604ab68ea3eb4 SHA-1: 1895fc9653c07eb019623cdd537a41c52b426db8 SHA-256: 815d4d6a85abdab32453f9d8f46661a1501e61c21d58992f688689ecc2d85085
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to appear as a free download, redirecting users to malicious infrastructure. The ML classifier strongly indicates malicious intent, and the presence of a known malicious redirector URL confirms this. The document body contains obfuscated text and URLs, suggesting an attempt to disguise its malicious purpose.

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=amplifier+gujarati+song++320kbps In PDF document text
    • http://feruxot.paulheroux.org/uploads/1/3/0/9/130969306/lulowazumegut.pdfIn PDF document text
    • http://files.mayamoralesofficial.com/uploads/1/3/1/0/131069934/38f07e.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/1/0433/4649/3605/files/69470402887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/gefin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1625/5650/files/14446841451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/enter_the_gungeon_monster_blood.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/dim_sum_menu_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/rogipubuzilorav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/61838745158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/jesuret.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/42907077833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/16631155298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7146/5630/files/handwriting_worksheets_cursive_alphabet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/blank_danger_sign_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/66746490795.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 2

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_off00005424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5424 5928 bytes
SHA-256: afd8996d11da2c14866790b3aced36a7c201dc5a3e5d934787c91249630cbf17
font_01_sfnt_off0000683e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683E 13072 bytes
SHA-256: 85395b7866ca7da9289a44319cd7bc825145c4410608b248b9ba8e11cb0f4f83

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