Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf47a6c777bc400…

MALICIOUS

PDF

46.7 KB Created: 2020-08-11 14:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7557c0279665752caadea71d47f1af34 SHA-1: 9480949a63a122dda010defabd4b911067c901df SHA-256: ecf47a6c777bc400f316647702fefd1ccb19a473dba6b529c2970da4d0431b6b
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=exadata+database+machine+administration+workshop+ed+3+pdf'. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to external PDFs, many hosted on Shopify. The document body also contains the malicious URL and a call-to-action phrase, reinforcing the lure to click the link. The primary intent appears to be redirecting the user to malicious infrastructure.

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.com/pify?keyword=exadata+database+machine+administration+workshop+ed+3+pdf In PDF document text
    • http://wuvurufo.whatthefunkdenver.com/uploads/1/3/0/8/130874359/xukufupaw-nesikakopin-wuzewifome-wuzigapolur.pdfIn PDF document text
    • http://fagojow.maennersymposium-schweiz.com/uploads/1/3/2/6/132680813/fefafodax.pdfIn PDF document text
    • http://files.sjssa.org/uploads/1/3/1/4/131438423/9058734.pdfIn PDF document text
    • http://files.bearnecessitiesworkshop.com/uploads/1/3/2/6/132695329/kufoxa.pdfIn PDF document text
    • http://files.kimberleykleczka.com/uploads/1/3/1/6/131606844/lodamesedowi.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/1/0432/6260/7518/files/dolerijudapefejij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/chahal_hadees_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/sobimoviroj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/sifebonuluxijozosefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5420/2013/files/selumalilunubev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/acs_general_chemistry_exam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3668/7008/files/apologize_onerepublic_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8846/8385/files/96350334826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/92110775523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/fubadobotutowotavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/20139522990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.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_off000075e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E1 5848 bytes
SHA-256: 9b31bc7e31bc5599ceeba4e52210a420a3264900501d24c0056afe85684ab46d
font_01_sfnt_off000089b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B7 10528 bytes
SHA-256: 0beb259dd086ecdbbb26ad73b79329a9aa7072680de9d543b5d344df8c31fb0d