Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d845810bfbbf369…

MALICIOUS

PDF

45.3 KB Created: 2020-10-25 10:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: e713601331ea789d1ab2c2ee3c092c7c SHA-1: 70c26861b611832782126b60b819436194ba4d85 SHA-256: 8d845810bfbbf36934da13d308ae53ad836aad832e8877a4fd008fbfecf85152
194 Risk Score

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.me/pify?keyword=zoomer+kitty+meowzies+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_5f907b79e73c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8751ab080ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_5f94f480f3f27.pdfIn PDF document text
    • https://razezoxuwen.weebly.com/uploads/1/3/1/4/131453099/sovovos.pdfIn PDF document text
    • https://wanuwoziburake.weebly.com/uploads/1/3/4/4/134458428/betofuzibikiruvi.pdfIn PDF document text
    • https://nivozigagu.weebly.com/uploads/1/3/4/4/134439663/baxab.pdfIn PDF document text
    • https://bagexefegaluja.weebly.com/uploads/1/3/4/3/134393574/turile.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/tisiwatijew_zixilawoj_gowewoniloramu_jisokime.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/lomewenidududibimib.pdfIn PDF document text
    • https://xukabasal.weebly.com/uploads/1/3/0/7/130776322/3378714.pdfIn PDF document text
    • https://naxupezo.weebly.com/uploads/1/3/4/3/134350891/9858612.pdfIn PDF document text
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/mafalefojuvixe_tulefewoki.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/zokonifekom_gudov_desazatugi_zilutofil.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/1/0478/0710/3143/files/fokiradub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3502/1471/files/robajesivoluwejizuzawax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4512/8858/files/cursive_handwriting_worksheets_6th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3331/6514/files/61880510998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7731/3733/files/60370331343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6268/0472/files/power_electronics_basics_fundamentals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3874/2440/files/fomogako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8226/0384/files/themes_of_alienation_in_metamorphosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9366/3137/files/81494852345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/wormate.io_hacked_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/announce_caller_id_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8425/0781/files/bunker_hill_security_camera_manual_62468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0302/5840/files/tipipilavebapef.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_off000073d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D1 4968 bytes
SHA-256: fcf7bbbcdc8bf22928e35fe6f4853fabbe86f3e586a722b2193030f7cf4547e7
font_01_sfnt_off000084cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84CD 10132 bytes
SHA-256: 90e60b076a3328f609ed979ca73b6cd485b55b1f7adf9b1e9bb30ef0aafbd507