Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f19c9d782db3d0…

MALICIOUS

PDF

45.9 KB Created: 2020-07-20 11:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 52b51decb2bcbe7da7aee4eaefd5b266 SHA-1: 5d886db67900c60c50ea5ff712d1c6ea2dd83b00 SHA-256: d4f19c9d782db3d02be64a5fb90b838e134584f3db3399308b89ecca38fe655f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Game rpg android terbaik offline 2020' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure. The primary IOC is the malicious redirector URL, which is likely used to funnel victims to further malicious content.

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=game+rpg+android+terbaik+offline+2020 In PDF document text
    • http://files.jasonhalf.com/uploads/1/3/2/8/132815854/4575775.pdfIn PDF document text
    • http://files.troutbum.ca/uploads/1/3/2/7/132710655/046c6686a.pdfIn PDF document text
    • http://files.wakevillagecogop.org/uploads/1/3/1/4/131406892/7941545.pdfIn PDF document text
    • http://files.marjattakaukomaa.com/uploads/1/3/1/4/131410818/7306451.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/1/0428/9835/8432/files/ganisififado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5964/1496/files/77635985140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7763/2154/files/larurisudodikadekinukax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/58035307852.pdfIn PDF document text
    • https://wuvidoni.files.wordpress.com/2020/06/42288416418.pdfIn PDF document text
    • https://zividiket.files.wordpress.com/2020/07/pakuzosesimewatumabu.pdfIn PDF document text
    • https://lupevuver.files.wordpress.com/2020/07/pimomesikoleketedefefapux.pdfIn PDF document text
    • https://waxizonuv.files.wordpress.com/2020/07/magonuvegogogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/73811168632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/25689981808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/60101066398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6281/9990/files/41506101718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/gifivemifafezaruvipikife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9382/7485/files/75036672076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9027/2675/files/jonubiterilufomajevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4781/3269/files/15361588068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/pasajabuberepirijasemumuf.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B5 5480 bytes
SHA-256: 9a388e837c067cc27925a0a31f381adbb21db4322ef193d8a049ffbe25c78082
font_01_sfnt_off00008838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8838 9792 bytes
SHA-256: a08914227663cf2094e52decdebd6cd9fd053192800621945060e3428af35fcf