Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb21c9381cca8b3a…

MALICIOUS

PDF

50.7 KB Created: 2020-08-20 07:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e8311572ae08f2d139d73bb5ca214abf SHA-1: a722367d0777860564bebbcf5aca04e95903c652 SHA-256: bb21c9381cca8b3a6741ff23bec4c5e331ec4e8e61995cd2b2c083e759f98858
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, many of which point to external resources, including a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL for the malicious redirector, suggesting an attempt to trick users into visiting it. No scripts were extracted, and the primary malicious activity appears to be link-based redirection.

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=anushka+sharma+video+song In PDF document text
    • http://tuzawur.joysassgrace.com/uploads/1/3/0/8/130814241/zuvogesazomalurem.pdfIn PDF document text
    • http://tavokew.indiapropertyinsurance.com/uploads/1/3/0/7/130775795/sasalugopok.pdfIn PDF document text
    • http://pazum.trangallan.com/uploads/1/3/1/6/131606339/ffdb97a63608.pdfIn PDF document text
    • http://files.hepworthchurch.org.uk/uploads/1/3/0/7/130739758/3916155.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/1/0433/5347/3189/files/speak_softly_love_cello_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9690/7684/files/japanese_anime_movies_2019_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/play_store_free_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/vusefijiduduwadanezafela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5920/6561/files/davoxezepolowutazojina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/wamipamonesuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/bagalujibipira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9013/9549/files/2766958588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/16935991389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/fuxidusomuzogamuduzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/7848/5925/files/boogie_nights_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2235/8427/files/86281901075.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66AB 5120 bytes
SHA-256: e62cbeda07c286af38922435af467dbf5868adf383efb1de3441a0f40d14d8da
font_01_sfnt_off000077db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DB 10040 bytes
SHA-256: 1ff75d77b074c593a8a3fd274b961a5db164470272335c35d05ea45962b009d2
font_02_sfnt_off00009a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A55 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
font_03_sfnt_off0000af6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3