Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b9d56054b45b39…

MALICIOUS

PDF

43.4 KB Created: 2020-08-20 04:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a1d8ee82e4b4760a62c4b9e52598db98 SHA-1: acb6a74777fc547f5b0aa2428a2643705ee99787 SHA-256: 83b9d56054b45b39b8e098fe5b316adb03f274d518e968870ea218c7bdb89c3b
194 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, with one prominent URL leading to a redirector service. The redirector is configured with a keyword suggesting a lure for a game mod, likely to trick users into downloading malware. The PDF also exhibits characteristics of an SEO link farm, distributing numerous links to other PDFs, some of which are benign but others are unknown. No scripts were extracted, but the presence of malicious redirector links and the SEO link farm pattern strongly indicate a phishing or malware distribution attempt.

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.com/pify?keyword=angry+birds+space+2+mod+apk In PDF document text
    • http://files.ianshermanlcsw.com/uploads/1/3/2/6/132695755/toliruwu.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/1/0432/6876/7907/files/gives_you_hell_sheet_music_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/57235011803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/9623/0312/files/workplace_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/sixinigidepez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0979/2407/files/61738159727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/lunifejigurogiweribarex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/cambridge_primary_science_curriculum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5679/0678/files/better_discord_custom_css_background.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2991/1957/files/bafg_berlin_formblatt_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/20477643484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/6919990378.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 1

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_off00006afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFE 5788 bytes
SHA-256: aedf2b7459f8f16e7c29cffa9e58c533d7d10a7231132aa7d9299496aaac5106
font_01_sfnt_off00007e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E97 10092 bytes
SHA-256: a8aa3bfbcde1813414f8490de689ad3434253057c047267a0df94511219dde5b

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