Malicious PDF — malware analysis report

Static analysis result for SHA-256 71af6680c4b84b5c…

MALICIOUS

PDF

66.8 KB Created: 2020-08-15 01:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 310737140c81c3a6fde3241f1d86349c SHA-1: 3abfb618947c05fa9b8468b9aba1a694c0b5107c SHA-256: 71af6680c4b84b5cffba2e4837ce2d24c8a909e61633b31e6be893c98142fef0
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting it's part of an SEO poisoning or phishing campaign. The embedded URL points to a known malicious redirector, which likely serves as a gateway to a phishing page or malware download. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing its malicious intent.

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=cognos+report+studio+case+statement+example In PDF document text
    • http://files.lauranaomiartisan.com/uploads/1/3/1/4/131406841/0cfd14c4cbe.pdfIn PDF document text
    • http://files.theoldvicarageburley.com/uploads/1/3/1/3/131380305/jedug.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/1/0430/4060/4313/files/7991254304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9308/2783/files/unturned_washington_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/rofadidugizidofuwaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45235944591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/steven_universe_torrents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/kuzepegofegevonaniveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/completing_the_square_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/sajujetolafixel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4154/4599/files/79492503381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/98559090837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7723/8945/files/java_iso_8601.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA0 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off0000c69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69B 5364 bytes
SHA-256: 18c7b06e949144243134087f73ffafe953cb3ceb0141e61103443b238ffbd921
font_02_sfnt_off0000d8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C6 10120 bytes
SHA-256: 5d7c1a08f7dabada699e47d82a1d171058cdf980cc5dadce95e407a3f9aa2a2e

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