Malicious PDF — malware analysis report

Static analysis result for SHA-256 a421df8f3dc49233…

MALICIOUS

PDF

46.2 KB Created: 2020-08-17 01:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db8a8028c6fc944923d91ada234af713 SHA-1: 9aa221ec16eac6d45ba9418fa3adff38c0e65183 SHA-256: a421df8f3dc4923318e02f0b50ae87c8d64961c508c07db647379236445b672b
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, indicating a malicious intent to direct users to harmful content. The document body text, though partially corrupted, contains keywords related to 'rpg games free for android' and the malicious URL, suggesting a lure for users interested in such 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=rpg+games+free++for+android In PDF document text
    • http://zozudoto.lifespirepa.com/uploads/1/3/1/3/131398367/6860825.pdfIn PDF document text
    • http://files.rubyjanebr.com/uploads/1/3/1/3/131379174/vawela_buwasodifama_ruzopepufiw_zudekusiliti.pdfIn PDF document text
    • http://files.jocelynpearsoncoaching.com/uploads/1/3/1/0/131070820/4992564.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/1/0429/7749/3146/files/90116670029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2857/8467/files/rsa_encrypt_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/kopiturowasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0305/2191/files/68698910755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0601/7185/files/dodge_charger_2012_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/93389845600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/3170378049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/sabipures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/42422399209.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 3

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_off00007592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7592 5336 bytes
SHA-256: fa3e91c1f666c786a8301aead6e90d371321b97985130c97e0563a38fe7ef9bb
font_01_sfnt_off000087ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87AB 10676 bytes
SHA-256: 73137de85e6779f7d50f93411c9ef00787a7a0de71d7b84e87508b53bbbd6ba6

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