Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15bce0a670edffa…

MALICIOUS

PDF

41.4 KB Created: 2020-08-13 22:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 163290a2152e713ee2e94eeccbf423af SHA-1: b5f5af4ac6bf63619ae77923fec47a55f2821747 SHA-256: b15bce0a670edffae49ca2edc5c86675fb18919512ddc36fed2a403de4b672b2
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to a printer specification, suggesting a lure. The presence of a link farm and the ML classifier's high confidence further support the malicious nature of this document.

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=hp%20laserjet%20pro%20m203dw%20printer%20specification%20pdf In PDF document text
    • http://files.schallisflyfishing.de/uploads/1/3/1/6/131636855/ff055.pdfIn PDF document text
    • http://sadeja.monasedrak.com/uploads/1/3/2/8/132814930/gepavewuwow-setedufo-dujagexa.pdfIn PDF document text
    • http://files.dysartgoodsco.com/uploads/1/3/0/7/130775299/guves.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/1/0434/9345/8070/files/riguxobobimaxos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2558/8639/files/35315575789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/30759608966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1538/7811/files/advisory_jurisdiction_of_supreme_court.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/10072299391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1825/9365/files/reverse_polish_notation_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/jajovilijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/79574542813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/lodutilajuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/gizuwoxofim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1308/6106/files/88428256456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/30898665142.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 4

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_off000056e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E0 5868 bytes
SHA-256: 519ba03bb6e950b9b7ee0bb184807259428be039aa09da5a763fa9a55115c776
font_01_sfnt_off00006ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD1 14864 bytes
SHA-256: ae774087d01bba1d286f97f4771df218d6ffde2c5d84c51a3a4a4b5a6970b90f

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