Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4be8b54e3edd7b…

MALICIOUS

PDF

41.9 KB Created: 2020-08-02 00:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 083cc0f4d28377cb0461f729ed5978f2 SHA-1: 7217a3c83d368b3973358ab050335817da3f2fda SHA-256: 5b4be8b54e3edd7b326cc24156d980e0d49f4c13d5003b5ba03438038ab0d307
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'generator installation manual'. The primary malicious IOC is the redirector URL, which is likely used to host or chain to 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.
  • 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=kohler+14kw+generator+installation+manual+pdf In PDF document text
    • http://files.oursavinggrace.co.uk/uploads/1/3/1/3/131384589/794c7eb26d5fd.pdfIn PDF document text
    • http://files.the-westwood-wire.info/uploads/1/3/0/7/130739996/710574.pdfIn PDF document text
    • http://files.2ndimage.co.uk/uploads/1/3/1/3/131383228/mapupopefolapavup.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/1/0433/0654/9406/files/71517878282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/bourne_identity_soundtracks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1771/5361/files/55036723598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/8232401305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/76072375309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3492/5463/files/76035360610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/56442798389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/bisede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5430/9284/files/13917703882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/tomapetatoz.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_off000065ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BA 5720 bytes
SHA-256: 0db7616d95d9ec80d7afe1d4fb6f3320c5fd5e463744ff341f3296bdb1b40b2b
font_01_sfnt_off0000792c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792C 9804 bytes
SHA-256: 11c5ada2b9fec9c2e136349409bc9579f1a53af3e2e576b9d6abf14603126950

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