Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2dfac248407708f…

MALICIOUS

PDF

47.3 KB Created: 2020-08-03 11:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a406222bd2de9c8d502db482fe079e12 SHA-1: 50c5c0d9ece2eb5dc09ed20f2858a94e194a1258 SHA-256: a2dfac248407708fd4cfc2c72236d7811573826491234236e3dfe9143e6043f5
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the same malicious URL and benign-looking PDF links, suggesting a lure to trick users into downloading potentially malicious content. The ML classifier strongly supports the malicious verdict.

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=beginning+programming+with+java+for+dummies+5th+edition+pdf In PDF document text
    • http://kobev.shoalbaysportfishing.com/uploads/1/3/1/0/131071157/tidori.pdfIn PDF document text
    • http://files.memorialvocalmusic.com/uploads/1/3/1/4/131408432/ruxogipet-nosexate-juromigiri-sulifepes.pdfIn PDF document text
    • http://files.necsema.net/uploads/1/3/0/9/130969663/e66424be.pdfIn PDF document text
    • http://files.fundle.us/uploads/1/3/1/0/131070331/vozafanusabakis-faviw-kopuminudil-gipumujuno.pdfIn PDF document text
    • http://files.wraparazzi.org/uploads/1/3/1/3/131384359/9059944.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/1/0434/3899/7669/files/68534808320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/pugezenamekivapebomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1722/3840/files/guvaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/90598212766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/gididitelikimek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4588/7905/files/vixifik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/35085292256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/40943113760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/94850905503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/mivugezinezas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3331/0870/files/vogugovadefepaza.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_off00007677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7677 5824 bytes
SHA-256: 033c0b1292976ae8fef683a081e8fd167e2984927e204059bf89755778779c4e
font_01_sfnt_off00008a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A49 10896 bytes
SHA-256: 6f27f6cedd9536435eb7c5c9520d0ab2b5c25323deae517116a23fdd13e1d2c0

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