Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3aecf55e09026fc…

MALICIOUS

PDF

63.4 KB Created: 2020-08-27 22:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a8a6f744d0a777253819788f439fdfca SHA-1: bb091f5414e75586a2a8b31ad9df70a90849d464 SHA-256: c3aecf55e09026fc60aa3c8d5b6c61a6d1d4160ac693af17144f763b9ab1de6e
194 Risk Score

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=warframe+element+mix In PDF document text
    • http://files.aloeverancl.com/uploads/1/3/0/8/130814680/811878.pdfIn PDF document text
    • http://files.milanitroutcottages.com/uploads/1/3/1/0/131070246/1501894.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/1/0428/2135/3635/files/45867155260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/98842913970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4935/2349/files/do_filme_carruagem_de_fogo_dublado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/1192/5158/files/41036372674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/java_code_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/biceps_tendinitis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1415/9521/files/87917600635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3456/5025/files/17528058242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/8466/3208/files/gitazeronakuvab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/publication_463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1713/4502/files/23273697978.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_off0000bb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB92 4816 bytes
SHA-256: c8e5dcb866076de8232a5397a6e176b1009bd71bd6d48488513db0d34bbbce90
font_01_sfnt_off0000cbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEB 10800 bytes
SHA-256: 66363fbbe7ba7d13b3aea458a20294f159c3eeef957bce6d237b917857c5fd0d

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