Malicious PDF — malware analysis report

Static analysis result for SHA-256 9865561cf2b2c6d9…

MALICIOUS

PDF

45.2 KB Created: 2020-10-14 18:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ccbff2405b884eb03f45980f74e59180 SHA-1: 747fbf5323a0ddcc8938af09633e7ba63a618cd0 SHA-256: 9865561cf2b2c6d9f00336357996d1103c45b2df68309176ddb042ffb2d7ec34
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.link/pify?keyword=andreas+moritz+gallbladder+flush+pdf In PDF document text
    • https://site-1040218.mozfiles.com/files/1040218/86494111988.pdfIn PDF document text
    • https://site-1038490.mozfiles.com/files/1038490/29502950879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f870ddb47a0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f8714764bed2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f870f2192180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f86ff8501e40.pdfIn PDF document text
    • https://site-1045312.mozfiles.com/files/1045312/mexomipizuxasoguxosu.pdfIn PDF document text
    • https://site-1038904.mozfiles.com/files/1038904/bukukopajila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f86f84b5fbc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f86f49455479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f86ffb65dd53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f87092e75e1e.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/1/0431/2770/1665/files/ladepufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3074/0135/files/how_to_make_a_program_run_on_startup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1684/5469/files/etextbook_guru_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/43809754144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/70916589850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9344/9122/files/jansport_odyssey_backpack_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/shawn_johnson_gymnastics_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5276/8666/files/62414258838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2281/0777/files/realidades_1_capitulo_4a_practice_workbook_answer_key.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_off00007152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7152 5636 bytes
SHA-256: 4071dea3b9360afbb5af2c80bcb9b701dda724af63f1131b7760ec16ded49505
font_01_sfnt_off0000844c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844C 10284 bytes
SHA-256: f254146193cee89a3e4aa39600d28cf55031e33d54a9b8d3ce2ccedefafc6fbb