Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c81583e4db6423f…

MALICIOUS

PDF

55.4 KB Created: 2020-08-02 04:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5067fa4d25cde6bbd00952bc5b090985 SHA-1: facf73ea0818726e9bebfbf76a5720f4f2225779 SHA-256: 6c81583e4db6423f76dc925c73436dfafcfdba32b73589998a412b4a3b09b622
202 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector for SEO spam. The document body, though heavily obfuscated, contains text related to "accounting principles 10th edition pdf" and a URL that matches the heuristic findings, suggesting a phishing or scam lure. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=accounting+principles+10th+edition+pdf In PDF document text
    • http://files.ruthworkssf.com/uploads/1/3/0/9/130969440/b7ce53c1aa3b4.pdfIn PDF document text
    • http://files.carolinemiekinaillustration.com/uploads/1/3/1/1/131164081/6229087.pdfIn PDF document text
    • http://files.moneygramvnvn.com/uploads/1/3/1/6/131637125/mukura_zezuvoxomuwo_defegapu.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/1/0430/6917/8017/files/lozizusigofavezab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/zelowuvezijopiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/12439975590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9664/4511/files/22592046034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/babidumevovilisago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/xudol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5055/5799/files/rodeo_travis_scott_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/87445220384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/57912478016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/54370202961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/vewazevesunixarob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/kotona.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDB 5388 bytes
SHA-256: e58e920baffb0833ecd2fe8fb87c0f8cdad529ece56b0c3b788954d3183f24f7
font_01_sfnt_off0000a039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA039 15344 bytes
SHA-256: b011f52d77a67901802789f4bd8af65eefd4523a502eb3b40aaeeb73dba1775f

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