Malicious PDF — malware analysis report

Static analysis result for SHA-256 866d418454db846c…

MALICIOUS

PDF

34.7 KB Created: 2020-07-31 21:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 42765157565adc8040270aae00e9503d SHA-1: 3457044523150f3a537f1aff4bbd1392486b6860 SHA-256: 866d418454db846c843fc2b7224fd46c6a522ea234dc37bd3690548a239a49f6
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified as a redirector for SEO spam. The document body, though partially corrupted, contains text suggesting a lure for a repair manual, likely to trick users into clicking the malicious link. The ML classifier strongly indicates 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.ru/pify?keyword=oldsmobile+cutlass+repair+manual+pdf In PDF document text
    • http://files.capitolsteamandclean.com/uploads/1/3/1/4/131454190/vozidupaded.pdfIn PDF document text
    • http://files.last-hope-tm.info/uploads/1/3/0/8/130813364/8539ff4a.pdfIn PDF document text
    • http://files.jadetempletao.org/uploads/1/3/1/4/131438202/6274821.pdfIn PDF document text
    • http://files.lighthousechurchathensny.net/uploads/1/3/2/8/132816036/xuwesizupifex-gegawin.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/1/0434/4555/1271/files/8306540533.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9141/8518/files/85091318423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/pogovalanorib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/larilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1047/4663/files/59400904777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/nesagetose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0510/7620/files/fabalipovirezowakejog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9291/6891/files/99013552357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3504/0664/files/80742873440.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 6

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_off00004930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4930 5468 bytes
SHA-256: 0b96819bcd4166262e6a68f042ed048e8fd91f1611a87421ca0fb74baf410aa9
font_01_sfnt_off00005ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA5 10016 bytes
SHA-256: e571da2ff958008bb84685398fcd6979033494631f40c4a05bcb3c5860fdc141

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