Malicious PDF — malware analysis report

Static analysis result for SHA-256 a709159b02d84e28…

MALICIOUS

PDF

45.9 KB Created: 2020-10-26 17:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 440598b765a6e12a616dca79856975b9 SHA-1: 1716aaf4a79a9328a56e6fd6e398862ab3a44316 SHA-256: a709159b02d84e28139aab772e8edd51f902d28eb053909b3ecaf3dd57d1ba7c
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/123?keyword=ttd+telugu+calendar+2020+pdf+tirumala+org In PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/f30897.pdfIn PDF document text
    • https://zajubazo.weebly.com/uploads/1/3/4/4/134452036/8278519.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/2880850.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/muvebakuwoluf.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/1/0480/7481/7693/files/registers_of_scotland_registration_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4114/2968/files/pets_at_home_dwarf_hamster_care_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1068/9694/files/vagobexali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1275/8426/files/vepimeled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0962/1664/files/53856594081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9213/0983/files/3881614556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/failed_to_fetch_platform_cordova-android_7.1.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c824401-0361-4339-8240-96c537c5367e/36993670061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00bd62cb-3014-45a7-a9e2-0dccf71daa8f/pawefixudibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c190ede-a40c-4f01-8ce8-fe96bd5efef8/2067859023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ac0a13-4597-409c-8e32-afe37d802448/best_warhammer_2_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30429e6-9cb9-4e44-a0c6-b51c21330b2a/tafifexovomovagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0917/8267/files/nba_2k15_controls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2955/7148/files/97086919863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0648/3389/files/electro_drum_pads_24_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/58663877191.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/fofasomibopanipefo.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/vujukunus.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/dovebexazatasuj.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A0 5520 bytes
SHA-256: 058799f638408a9e62efa1c3666bf17a0ff9248dd350dd61be7a3751a3811cad
font_01_sfnt_off00008447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8447 11544 bytes
SHA-256: 049bc684eb3e81e5fcf5ea6b4bb446f4e71d5e39678fa175ec10d80c711f92af