Malicious PDF — malware analysis report

Static analysis result for SHA-256 be706c8663bbf356…

MALICIOUS

PDF

47.8 KB Created: 2020-07-29 15:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 877ffb88583177bd950ede55e7a0a69a SHA-1: e2c51dc4fcd18201a5ef34f6cadf7c0efdc766f5 SHA-256: be706c8663bbf3560daf479e3645ca07d9a234d6cce4a26ecb2eab0fc5e743d6
202 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a link to a known malicious redirector and a large number of external links, suggesting a link farm for SEO poisoning. The document body, though heavily obfuscated, contains text related to 'Kptcl recruitment 2020', aligning with the lure of a recruitment notification. The primary malicious IOC is the redirector URL, which is likely the first step in a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=kptcl+recruitment+2020+20+notification+pdf In PDF document text
    • http://files.apostrophe1.com.au/uploads/1/3/1/8/131856626/mosofi.pdfIn PDF document text
    • http://files.emateria.com/uploads/1/3/2/8/132814241/614f62bb2a9.pdfIn PDF document text
    • http://files.kcsfinestsportscards.com/uploads/1/3/1/4/131410952/dozafes-bevivej-gijis-zusegimebaxik.pdfIn PDF document text
    • http://files.stthomasaquinascharnwood.com/uploads/1/3/0/7/130776676/davuxav-lusotagegojumak.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/1/0430/7252/0353/files/ketufexojetebutaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8729/7696/files/luvij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9386/9212/files/47877362876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/45668670446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/tapivobereb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0845/7877/files/somovenusipepuvugop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/disiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5661/8917/files/85351276804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.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_off00007daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAA 5248 bytes
SHA-256: 595a654f782676a6a2d47d45107b2559a1c630af9e097db290c8f76b8e202d8e
font_01_sfnt_off00008f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F69 10052 bytes
SHA-256: ac8a4924c0f034d4d55432a593140b9f0139cbed384ca9704184d5197753902e

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