Malicious PDF — malware analysis report

Static analysis result for SHA-256 d315f977bd3a79a0…

MALICIOUS

PDF

42.7 KB Created: 2020-08-15 01:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1b402de99b961fa43401cceb1a0688a SHA-1: a77c5593cfb377b138216c30ff05aa4b5cced282 SHA-256: d315f977bd3a79a0e6a6c063e5c795791f088f0552c00c35fc51814ff96c590e
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/wb?keyword=aparato%20reproductor%20masculino%20pdf'. The document body, though heavily obfuscated, also contains this URL and other links hosted on Shopify and various unknown domains, suggesting a link farm designed to attract traffic. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=aparato%20reproductor%20masculino%20pdf In PDF document text
    • http://tifinano.tutorslink123.com/uploads/1/3/0/8/130814328/zulawanuxaj_vanubol_maxowe_bipawoma.pdfIn PDF document text
    • http://mavufux.liverpoolsouthcircuit.org/uploads/1/3/2/7/132740405/vinavaji_zaviliv_lugasibiwa.pdfIn PDF document text
    • http://files.espanishblues.com/uploads/1/3/1/8/131856627/1421019.pdfIn PDF document text
    • http://files.waggonerinsiders.com/uploads/1/3/1/3/131398129/vomisunigari.pdfIn PDF document text
    • http://files.wttraveller.com/uploads/1/3/1/4/131482941/9706663.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/1/0433/3748/2405/files/xowejorugivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/adolix_split_merge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/61299198593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8652/8155/files/tango_albeniz_kreisler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/anatomy_of_forearm_and_hand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6546/6270/files/how_to_quote_in_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9191/7989/files/chinese_learning_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2516/5476/files/91416354445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2949/4933/files/invitation_to_the_lifespan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6719/5040/files/barcarolle_op_60_chopin.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_off00006850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6850 5288 bytes
SHA-256: ea977d66535bc79a41aa17d09db8f014bd1d827cbf45209c19bb9adde4bbee4e
font_01_sfnt_off00007a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A32 10652 bytes
SHA-256: 56ff7ac3746cbe45b9792fa3e9700a0108fe95d0bb15a8ab29a8a3094d01f3c2

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