Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1e1feaf6db4c7d…

MALICIOUS

PDF

49.1 KB Created: 2020-08-18 22:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d16a1d866c06fb0cc5b735cdc33b3470 SHA-1: 3839ac72308a754c24b0a7cf81c5e8821d4e0783 SHA-256: 5c1e1feaf6db4c7d149e8c25aeb4073e9db6f78b5dce253742bd7698838b3fa9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a redirector URL, which is part of a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an intent to trick users into visiting a malicious site. The ML classifier also strongly indicated 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.com/pify?keyword=beginners+guide+to+intermittent+fasting+16%252F+8 In PDF document text
    • http://files.yourlushgarden.com/uploads/1/3/0/7/130740068/03036.pdfIn PDF document text
    • http://gejiri.robbatesphotography.com/uploads/1/3/1/4/131406390/83fc7d50e.pdfIn PDF document text
    • http://files.21socialstudies.com/uploads/1/3/1/0/131070394/6b834ca.pdfIn PDF document text
    • http://muvuxug.escapemachine.com/uploads/1/3/0/7/130775169/8cfb3246122.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/1/0433/4118/5189/files/54067943841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3974/2369/files/circulatory_system_mcgraw_hill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6748/7894/files/38417222159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4783/0183/files/46659014811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/watch_my_gf_password_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/gisigujuvelurebixonodep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9198/3512/files/backgrounds_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/34817684324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jaxigosileworu.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 7

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_off000081dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DD 5680 bytes
SHA-256: 7a0b1032486446601a98bb8cdc72536653da1e16dd047b0c105b9f65b7f7740a
font_01_sfnt_off00009520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9520 9968 bytes
SHA-256: 3fee50e73ed269146594f0ab2f70b6bc98510204707a2ba240caec8e6e95f675

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