Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff8a0d4f3d18a62…

MALICIOUS

PDF

46.3 KB Created: 2020-08-18 23:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d0df615be6db1fcbf2e64bae6662c76 SHA-1: eaadc8a356e6ecaff564cfdb7ebc108894ac527e SHA-256: cff8a0d4f3d18a628b44d85e27898bc50fb69660cfaf31dbd02830f185ecd616
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm designed to manipulate search engine results or obscure malicious destinations. One critical heuristic firing confirms a link to a known malicious redirector, 'ttraff.cc', which is used to deliver the final payload. The document body, though heavily obfuscated, contains text related to 'Calendar 2018 pdf canada', suggesting a lure for users searching for such content.

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=calendar+2018+pdf+canada In PDF document text
    • http://files.idlesappho.com/uploads/1/3/1/8/131856039/zaxeje-povorifepakuzi-tubededubez-jaruleti.pdfIn PDF document text
    • http://files.crowncustomsandcoatings.com/uploads/1/3/2/7/132740628/jejuboliminazuredilo.pdfIn PDF document text
    • http://files.boundtogethercounseling.com/uploads/1/3/1/4/131453365/mosawufakedanux_zasimiwo_banemojizu_zowipan.pdfIn PDF document text
    • http://dowar.shoppingforagift.com/uploads/1/3/0/7/130739173/7847082.pdfIn PDF document text
    • http://files.artisticlicensequartet.com/uploads/1/3/0/7/130740625/desanusez-wutoka.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/1/0432/0726/2367/files/43008812783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/captivating_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7886/7351/files/79313777647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0729/3086/files/69943094373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7027/4201/files/48034228907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/17711187929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9699/8041/files/character_traits_graphic_organizer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6809/4629/files/reset_master_branch_to_upstream.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/piwiwadupovine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7745/8334/files/traductor_portugues_brasileo_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/54771635147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/vogoxogukofemebuforo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/lonixivupelukugom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6088 5396 bytes
SHA-256: 8de0f9d6253f2c2693503c779e05038e062e5689aa571e5a37f49b9b4610d181
font_01_sfnt_off000072f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 10604 bytes
SHA-256: 679c7fcfea43a01515d9a076f091180dd5283fda7faea3783d44fa41018c82c2
font_02_sfnt_off00009705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9705 16108 bytes
SHA-256: aed46c9af23f208f135cb03afacfd1ac790ba89857c5134c11dc43e7260cc7d5