Malicious PDF — malware analysis report

Static analysis result for SHA-256 88641a5a60bf7a63…

MALICIOUS

PDF

34.7 KB Created: 2020-08-14 01:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a84928be3a3098e30bd416366c54cb9 SHA-1: 58369e9a55339520410d8be9b47ccdff69d0ced6 SHA-256: 88641a5a60bf7a631dbc4688a72699ade7353c8f5fee17af6c21c97610d3ca3e
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service that is known to host malicious content. The document body and embedded links suggest a lure for a game hack, likely leading to malware download or phishing. The ML classifier also strongly indicated maliciousness.

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=aimware+csgo+hack+free In PDF document text
    • http://files.cocoamoy.co.uk/uploads/1/3/0/9/130969048/4511609.pdfIn PDF document text
    • http://files.hopelutheranwarren.com/uploads/1/3/1/4/131453086/lepalixopabew.pdfIn PDF document text
    • http://nixijumi.franklywithfaith.com/uploads/1/3/0/8/130814855/a66f4543a8da.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/1/0429/1903/5033/files/33147310182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74195332560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/31077587610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/gazetajidomabanogujet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1704/3111/files/84885415625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/tusigulanugolusegebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/corpus_juris_secundum_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/rokabanosibakamig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3174/0066/files/53955076250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/concepto_de_contaminacion_ambiental.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4344/files/63839827536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/23425424772.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 5

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_off0000497e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x497E 5408 bytes
SHA-256: 97019c369e2c8e2b0b65389158bb058a98609e98ef86dc8146027ce1df0b5f24
font_01_sfnt_off00005bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCA 10076 bytes
SHA-256: dd189ad7a6afff1e88ff131a40b12ef54cb4dfcbc111ede7b7185fc14470df1e

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