Malicious PDF — malware analysis report

Static analysis result for SHA-256 767bb871b48c1766…

MALICIOUS

PDF

38.9 KB Created: 2020-08-03 03:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c0fd28cba8ba497368ca3ed50ca64f6c SHA-1: e9e6967a1226e92d000b1eb2af2c2528ccb4e75e SHA-256: 767bb871b48c1766a60bc7b61f74e1c87c4a3947c4e12c77f1b8e1da6620e4da
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, many of which point to a redirector service identified as malicious. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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=mythology+edith+hamilton+pdf+download In PDF document text
    • http://files.markuswalterart.com/uploads/1/3/1/4/131483719/2140306.pdfIn PDF document text
    • http://files.patriksoderstam.com/uploads/1/3/1/6/131636825/4420188.pdfIn PDF document text
    • http://files.gercahillibclc.com/uploads/1/3/2/8/132814958/jupubamaxaterisimobi.pdfIn PDF document text
    • http://files.terrencejon.com/uploads/1/3/0/8/130874361/vaxerawej.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/1/0438/5413/5456/files/dragon_nest_level_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/54864874458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/ruduridowuvobulejegorifok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/99981511327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/74485076349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/44689211407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/72056847999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7670/5692/files/jixovuviluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2352/4259/files/74584900927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/18299840323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/23584456768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5054/7870/files/mutomududuvategina.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_off00005a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A10 5380 bytes
SHA-256: c4c3647eb800f9b7e181edcbe749a1503077af7001e6b5d68efc1b280dd65d9e
font_01_sfnt_off00006c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C60 9976 bytes
SHA-256: 9a5179648cfba83355d954a7aade549c033e9c663b8ffe9527ff0f68848dc928

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