Malicious PDF — malware analysis report

Static analysis result for SHA-256 d137298aa03991d9…

MALICIOUS

PDF

50.5 KB Created: 2020-08-23 17:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1c4f9b476d5bf7aa820176cf2dc9c6a SHA-1: a07196a821d481cfbd97d0f923688b58a52aec25 SHA-256: d137298aa03991d942ded99f022015553731118e11bcb69ad43cef60bda682c9
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=sheet+music+eine+kleine+nachtmusik+piano'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same lure text and URL, reinforcing the malicious intent.

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=sheet+music+eine+kleine+nachtmusik+piano In PDF document text
    • http://xipoxa.anndcroghanart.com/uploads/1/3/1/4/131483416/jarozanax-lenenogaru.pdfIn PDF document text
    • http://files.chezchase.com/uploads/1/3/1/4/131453054/ebbacbc25c0a9.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/1/0438/4735/2480/files/gufujoxuwife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1575/7214/files/74505722828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5336/5910/files/stock_market_basics_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9207/3895/files/63425738000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/forrester_research_reports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/american_pie_book_of_love_the_bible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4000/6559/files/kebexumowamoreti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4429/8133/files/smartscape_3d_for_navisworks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/kajajeposilojafakekeguk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7587/0630/files/jilurililomosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/cocoonababy_nest_fitted_sheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off000062d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D3 5244 bytes
SHA-256: 2e33611bc5be0da9e77d7fb871a3ab4c5949ad332777cfb7e262126e62c15ed7
font_01_sfnt_off00007488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7488 15860 bytes
SHA-256: 913db0d7d0ff5d7cbb2275975324abb02cd5971402da4b9509e073fe35c67983
font_02_sfnt_off0000a609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA609 16100 bytes
SHA-256: 84650fe671c70ac66f3af0994468c9b9feb42d01905b0f030d5781e095ef8e52

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