Malicious PDF — malware analysis report

Static analysis result for SHA-256 519af987e43cd4fb…

MALICIOUS

PDF

44.9 KB Created: 2020-08-13 21:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7ab073013050767e9ca51c8a7db43c5 SHA-1: 7285080a496837e2ee6bda2f9941969b7600eaee SHA-256: 519af987e43cd4fbcf2b87e8fbeff2ee61330c8d28b330659bac9b5ef6dbb1db
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.cc/pify?keyword=alpha+helix+vs+beta+sheet+amino+acids' is a known malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other links, suggesting a lure or SEO manipulation tactic to drive traffic to malicious sites.

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.cc/pify?keyword=alpha+helix+vs+beta+sheet+amino+acids In PDF document text
    • http://files.ryansbill.com/uploads/1/3/2/6/132681916/vejapinona_wipifujudefuzob_gamope.pdfIn PDF document text
    • http://files.heimler-international.com/uploads/1/3/1/0/131070561/9650110.pdfIn PDF document text
    • http://files.mysmellysocks.com/uploads/1/3/1/6/131637362/wigokafadawok_vigurotekusel_mukadezuzaz_sodumotawed.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/1/0433/0687/7080/files/20116177671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/tozizixebelupidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/ridulada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/pidasupixinowetogaralakoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/zejidabonifeniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/ruin_my_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0182/2875/files/xixafoxobusowudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/42729672188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/92880094798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/dusotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/lcm_of_8_and_3.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 4

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_off00007047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7047 5472 bytes
SHA-256: 9206334cc008f2b76a70965e1a8e9106fd24c29aa7bfc909ce413f43eafe81f3
font_01_sfnt_off000082bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BD 10700 bytes
SHA-256: 321bbc1a3c3038dc4d0ba7a55e91e822dd61a1eca2aac9ef783cf2998ebbaf02

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