Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ca779f02c8dc15…

MALICIOUS

PDF

44.6 KB Created: 2020-08-14 00:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ccc2d205cda09e9f55ddf5be14dc37d SHA-1: 3cc903b5daaf1b212cd8292476b8caa3d108cdb0 SHA-256: 50ca779f02c8dc15438097fd8f355984af733dce8548054a122d1fdbcf8cd099
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. It also contains a large number of embedded links, many of which point to a redirector service. The ML classifier also strongly indicated maliciousness. The document body contains the URL https://ttraff.ru/pify?keyword=whistle+naa+songs++telugu, which is a known malicious redirector.

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=whistle+naa+songs++telugu In PDF document text
    • http://files.donnacolemanphotography.com/uploads/1/3/1/3/131382841/5e2a1c28.pdfIn PDF document text
    • http://files.mypurplelilyboutique.com/uploads/1/3/0/7/130775219/8008134.pdfIn PDF document text
    • http://files.infotechserve.com/uploads/1/3/1/4/131437657/5530182.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/64116527336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5794/6530/files/emotional_development_in_adolescence_11_18_years.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/canada_israel_free_trade_agreement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/55057262038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/exam_az_203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2707/1130/files/98624304136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1021/1491/files/wow_classic_gorilla_fang.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/backus_naur_form_notation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5105/6284/files/29805556711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 4748 bytes
SHA-256: 59af69c74fd809cd86b3f129dc93658cb011b437e79865ff4ef08406053c6c16
font_01_sfnt_off000072f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F4 10744 bytes
SHA-256: 1b8f4033de1c7b98254f0a8d7b7e5f6cae14b9d87fb66c9fe3afb1fbbc8f41d2
font_02_sfnt_off00009797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9797 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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