Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a6d80148f250dc1…

MALICIOUS

PDF

42.9 KB Created: 2020-10-18 01:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb94768b319355b29796c1f65a490672 SHA-1: 85a8c4053b3f86d5d9578b003dc593664066a0ae SHA-256: 6a6d80148f250dc1aa82a199b31bdb5a42def8ae1da7fbffad832bf51dd71c56
154 Risk Score

Malware Insights

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

This PDF file contains numerous links to external PDF files, many of which are hosted on link farms. The primary link, 'https://ttraff.link/123?keyword=hand+washing+steps+for+nurses+pdf', suggests a lure to trick users into downloading potentially malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/123?keyword=hand+washing+steps+for+nurses+pdf
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/zadofurijokub.pdf
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/30b71999ce14.pdf
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/vojuxopitedigamominu.pdf
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/9462329.pdf
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/948c7196.pdf
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdf
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/bofajifolapumalij.pdf
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/9abce3676732.pdf
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/862f4.pdf
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/1aa709cded9.pdf
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/wugukokedomijis-xizob-xejivab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0266/7921/4265/files/cat_in_the_hat_poem_i_love_my_job.pdf
    • https://cdn.shopify.com/s/files/1/0439/4336/2715/files/minna_no_nihongo_free.pdf
    • https://cdn.shopify.com/s/files/1/0484/7088/4514/files/ginojupofo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/zusuzerolisif.pdf
    • https://uploads.strikinglycdn.com/files/7458288a-3afc-4334-ae26-d5f50e0c756f/41435952466.pdf
    • https://uploads.strikinglycdn.com/files/8c1d90f2-8956-4f92-9f8b-2d8de616bc24/toboxurijunana.pdf
    • https://uploads.strikinglycdn.com/files/cb539d5c-9217-48b0-ae45-fcc9818d91ed/81365264893.pdf
    • https://uploads.strikinglycdn.com/files/dc4f1e07-31b0-474d-91e5-a00043b3e66b/48997592893.pdf
    • https://cdn.shopify.com/s/files/1/0482/2931/8808/files/jet_diver_trolling_chart.pdf
    • https://cdn.shopify.com/s/files/1/0268/8558/7144/files/icy_veins_arcane_mage_easy_mode.pdf
    • https://cdn.shopify.com/s/files/1/0497/4028/4101/files/74611173733.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000691c.bin
6f2865bdd24c0868e9b8c2528d87b9a6059a821eddb0238573fe922bd3f8bea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691C 5324 bytes
font_01_sfnt_off00007b3f.bin
13b7ba1936c1ba9bd16e2588c61def4f7ef300ac7002ec5b36c407babdafb44f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3F 10316 bytes

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