Malicious PDF — malware analysis report

Static analysis result for SHA-256 25808cf45270a76f…

MALICIOUS

PDF

82.3 KB Created: 2020-10-29 02:26:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 50b4f2a1eed55590f707ecc9f4a6c01f SHA-1: 8d2b5862a91cbe08a698ce3cdd18b808d56500bd SHA-256: 25808cf45270a76fa41e04684cf40acf121211882c73e1ae2cc30d5f1ac16059
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm. One of the primary links, 'https://ttraff.link/pify?keyword=small+silicon+chip+portia', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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.
  • 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/pify?keyword=small+silicon+chip+portia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5f9716430e6e6.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/ridatudumiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f87786ebe0e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383792/normal_5f982ea6ae5c1.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/nawewesujujaz_junujuvetutil_godogetenew_xerijulofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5f8bd73916ae0.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/lariwadix.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/1/0479/6694/5447/files/progress_bar_in_fragment_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/22808396793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4359/3109/files/center_cut_pork_loin_cooking_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac1cc5f-a2c3-4ce5-8bb3-b6cc42b0fb0c/fajafizinob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/1158732013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6419/9841/files/99726779146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f42064e-7167-46c1-912f-b9730e3d4adb/24570832977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5876/4197/files/59584932203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/409d2e06-71ed-4f43-8b04-96e49cb863c1/34821731052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0746/6398/files/59435572969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/castsequence_macro_ffxiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9027/9077/files/talrand_sky_summoner_copy_spell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6398/2233/files/synonyms_antonyms_and_homophones_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9851/2803/files/kung_fu_shirt_pattern.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6734/9923/files/sunset_bay_resort_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6714/1017/files/hard_answers_quest_in_skyrim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/girogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7299/3435/files/big_little_farmer_game_mod_apk_download.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_off00010268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10268 5276 bytes
SHA-256: 563879238e10f1affb84bf09a8c90e952211e32880e9a7c6d6a24a5870bc68d2
font_01_sfnt_off00011428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11428 11764 bytes
SHA-256: 22e177a7ec4d23e66400ecf3bba2311ef6949985d520aeb910c9631afd9fd471