Malicious PDF — malware analysis report

Static analysis result for SHA-256 a11f40bcc6e3eedf…

MALICIOUS

PDF

40.0 KB Created: 2020-08-04 16:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 65ff943ceb0ffba9fab516f1f26632aa SHA-1: 941e1257b10d4a8cde6d49087d8c940254df402d SHA-256: a11f40bcc6e3eedf723f9a6099a77c308f53fbcd66257d63cbacdbf63ae2cc29
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious domains or redirectors. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one URL leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic further suggests a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute malicious content. The document body, though heavily obfuscated, contains URLs that align with the heuristic findings.

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=plotting+coordinates+worksheets+pdf In PDF document text
    • http://gubuk.alardfilmfestival.com/uploads/1/3/2/8/132815002/bufozamamarow-pezotosufamu.pdfIn PDF document text
    • http://files.beautiful-astrology.com/uploads/1/3/1/3/131397964/ea95b6f3ae15ca0.pdfIn PDF document text
    • http://files.headofthekas.com/uploads/1/3/1/8/131856333/8113225.pdfIn PDF document text
    • http://files.fitbyfire.com/uploads/1/3/0/8/130874295/vupozud.pdfIn PDF document text
    • http://files.viptowingcorp.com/uploads/1/3/0/8/130874118/morekigagigobid_numajimipuwoze.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/1/0431/0266/6906/files/dezufivepoluxelawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5372/7387/files/tumifalifimonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/vinetapiwefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47475247643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/webofirupexoweparakur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/94267939228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1251/1128/files/18738043684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/figuxepukilin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/29538289826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/javascript_array_concat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/lejuniropufitabufuwidaxi.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_off00005e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9C 5576 bytes
SHA-256: 84b1ee0c05d5a3c49ec7b606135be7b3ae59a61fd3fe24c87e2b2bab286b4f9d
font_01_sfnt_off000071a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A2 9788 bytes
SHA-256: df401f156513c4de4b5a20135d9725e207550df9c783246eb4224580587e0b3e

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