Malicious PDF — malware analysis report

Static analysis result for SHA-256 77cf1fe052cd0d0f…

MALICIOUS

PDF

34.8 KB Created: 2020-08-11 16:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 46285eef7e0969b6e62e8627ef1fdbe9 SHA-1: ec3a184898eae93b196ff6825dfb7f59cf038841 SHA-256: 77cf1fe052cd0d0f22e6e029b54943e9c213dc2e0d60c0bbf0f0b9b671ce6c87
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service that ultimately leads to malicious infrastructure. The document body, though heavily obfuscated, includes a URL that appears to be a lure for song lyrics, likely intended to trick users into clicking through to a phishing or malware distribution site. The ML classifier strongly indicates maliciousness, and the presence of a redirector link confirms a 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.com/pify?keyword=alan+walker+faded+lyrics+pdf In PDF document text
    • http://files.chuanfaacademy.com/uploads/1/3/1/0/131070723/zumatajejuxelemutap.pdfIn PDF document text
    • http://files.fitkidtext.com/uploads/1/3/1/1/131164009/vonijalijenen_fatesob_ketixu.pdfIn PDF document text
    • http://files.otterworksusa.com/uploads/1/3/1/4/131437351/tasegus-rekafi-zeganusisaj-jigavulef.pdfIn PDF document text
    • http://wudopove.reinwatchphotos.com/uploads/1/3/2/8/132814930/3699396.pdfIn PDF document text
    • http://bidesabi.padisciples.net/uploads/1/3/0/7/130775219/d5a2de30.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/1/0431/6705/6028/files/suniparijojivosina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/jatijezavusosoxazolere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3624/5144/files/guvolupirolerijixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/barry_seal_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/dr_brian_weiss_only_love_is_real.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3331/8808/files/76003877536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/60345568470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4432/1945/files/gimp_2._8._22_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/210599405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/nfpa_1031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/luwutuxuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/componentes_de_la_personalidad_temperamento_y_caracter.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 8

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_off00004774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4774 5396 bytes
SHA-256: 3f1d32278b105e59f6cd24cff79fa94f6d6c08a14ae374d0fdde97ae6d9e3c64
font_01_sfnt_off000059f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F3 10844 bytes
SHA-256: c39b13d9ac3647713ce12711400cadeb15bc160515285364982f66b744619f44

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