Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bcf9e169d61e72…

MALICIOUS

PDF

56.8 KB Created: 2020-10-28 00:04:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1535705a08a238120a4268500f59a558 SHA-1: 3baed34e4eef328dcf257be7804df82938ac8354 SHA-256: 78bcf9e169d61e72bab68702ca995bad39edcf2c17b34038b7e614d722252472
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/123?keyword=mothra+x+godzilla+human'. This URL is designed to lure users to a potentially harmful destination. The document body and embedded artifacts do not provide further specific details, but the presence of the malicious redirector strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.link/123?keyword=mothra+x+godzilla+human In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tadovu/78599625509.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/carnot_cycle_efficiency_derivation.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/free_ethiopian_history_books_in_amharic.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/21359168295.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/nefutofitutubat.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/ramadan_calendar_2019_lahore_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/factores_psicosociales_extralaborales.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/60019792519.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/gurps_space_bestiary.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/kezuxisewavafedamifi.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/zuvagaripelakaxudiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/alias_grace_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/zidugofinitozejagukikivo.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/jabidedase.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/65718129963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f980dad5-caec-476f-b09b-c07ae426b7d9/xunidotutarozibebeleki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd37a323-871e-4646-8baa-3a0d435fde21/14685855221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa1fe997-6ed7-4db9-9e80-272ab40895e8/nemewusagegezewop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d736f1e-f219-4a61-b0df-29532a4016e8/10859882387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e257ccd-6207-465a-a116-9a49f3cd9c5c/fimefupinegedirobuju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000936c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936C 3216 bytes
SHA-256: e1f16f2f067bb961bf7714a6f4702311fe8fd11ca02194353183ad9edf632392
font_01_sfnt_off00009eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EFF 5184 bytes
SHA-256: 8704d725200051eecb170949bd63966decd154b0f55c7938abee76a749f3b971
font_02_sfnt_off0000b08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB08C 11028 bytes
SHA-256: 31d485ff413fa51e0060b067a5ed3e2f8ca67431f0cb28225560014e61b8ee06