Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef45fe481d41b24…

MALICIOUS

PDF

41.3 KB Created: 2020-08-19 06:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e6a567a65b5654698e6bdda41f1ae5d SHA-1: 57f279c98b54ae150e016c60775a22376299c9df SHA-256: 2ef45fe481d41b24e7dd008d92e553c13c525d20f6182628cab30afd1d5a4c78
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=anexo+14+oaci+volumen+1+pdf', which is likely intended to redirect the user to a malicious site. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning attempt to distribute malicious 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=anexo+14+oaci+volumen+1+pdf In PDF document text
    • http://zujilixig.theorlandorealtor.com/uploads/1/3/1/4/131408229/kujujunumijokev-gisov-redewivonoga.pdfIn PDF document text
    • http://files.ismaakarate.co.uk/uploads/1/3/0/8/130873828/sezanoluvekubup.pdfIn PDF document text
    • http://files.cacmun41.org/uploads/1/3/0/7/130776562/xajububika-zojixizukir-wezufal-doranakeperupe.pdfIn PDF document text
    • http://kigokawuz.stfrancisxavier.org/uploads/1/3/1/3/131379894/jakax.pdfIn PDF document text
    • http://jineligi.kantkollections.com/uploads/1/3/2/7/132740214/3190415.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/1/0441/2299/6888/files/ancestors_legacy_dlc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/ergonomie_d_un_site_web.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/crimson_dawn_of_peace_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/mofazegegovejejupokog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9145/1303/files/ballade_pour_adeline_sheet_music_free_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7175/6698/files/encyclopedic_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/zefotobivago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/logic_games_bible_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/najejedosexedafivedem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3540/1111/files/ielts_placement_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4320/4765/files/71720249550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0141/1744/files/nex_solo_guide.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_off00006216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6216 5284 bytes
SHA-256: ebc9f9ef8a97c0987d5c87101b309eb61921d79a7992bb74cc0acb878572efa8
font_01_sfnt_off00007417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7417 10616 bytes
SHA-256: 5313c314e1fd027803fb6f3c65dc2ae09f6e729e7f90a1115e60f6629b5ef446