Malicious PDF — malware analysis report

Static analysis result for SHA-256 be62c3e0a98ca195…

MALICIOUS

PDF

43.4 KB Created: 2020-08-19 10:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41a3cf638dcb20259fa58c0c7b83e246 SHA-1: 95f2b51deab461a93b72b6f23131360b7286c5f9 SHA-256: be62c3e0a98ca1954a0ed634284375e2c9c69942580b4223de76f23c6272713a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'centrifugation techniques pdf' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious link redirects to 'https://ttraff.ru/pify?keyword=types+of+centrifugation+techniques+pdf', suggesting a lure to download further malicious content or visit a compromised site.

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=types+of+centrifugation+techniques+pdf In PDF document text
    • http://xilurez.shorelinehicap.org/uploads/1/3/0/8/130814526/40f02cc547975d.pdfIn PDF document text
    • http://dufaje.rockofoakland.com/uploads/1/3/1/0/131070112/magowefevoma-bobutuxewan-jutujobena-kewizokafupajig.pdfIn PDF document text
    • http://files.struncburkefoundation.org/uploads/1/3/2/7/132712072/giwurewirupobiz.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/1/0432/4261/9035/files/54648203915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2633/3351/files/27446320317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/drop_down_list_for_multiple_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/wutiboxobirigazagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tifomev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/63045508489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6438/5951/files/zegofufagutakiwomavewox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/jobutoxuweri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/52445228540.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 2

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_off00006ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE6 5560 bytes
SHA-256: 31ede77b65952b46ede2998eb88f5db2b090b554608f559b3c4e570877f7aabc
font_01_sfnt_off00007dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCD 10292 bytes
SHA-256: cb5d79012cd298761afbd298533a9321836bc10278d8a15d7944aeb70bda76f8

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