Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0955a3b8a0488b3…

MALICIOUS

PDF

41.7 KB Created: 2020-10-09 12:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: b7cac5ca12776cc7b02d85fdfae3418a SHA-1: e803908ab3ede5b8a3d30dcefca5d4c0ed5471d2 SHA-256: b0955a3b8a0488b3c8b167ee3e25052475a99a55d140ec8d8917447ddbbbc875
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=palmistry+guide+in+hindi+pdf In PDF document text
    • http://bowuxo.fcsautomation.org/uploads/1/3/2/6/132680835/5a6870c8c014.pdfIn PDF document text
    • http://sapiba.consistentlymediocre.com/uploads/1/3/1/3/131381302/9983929.pdfIn PDF document text
    • http://lugexifu.klemonshealthcareconsulting.com/uploads/1/3/1/6/131606346/9318501.pdfIn PDF document text
    • https://site-1039361.mozfiles.com/files/1039361/21746272694.pdfIn PDF document text
    • https://site-1038358.mozfiles.com/files/1038358/sibanatun.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/kivaledowemu.pdfIn PDF document text
    • https://site-1037889.mozfiles.com/files/1037889/vamodejo.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/1/0438/9113/0536/files/87256114436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/5249/7827/files/project_angel_heart_jobs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8240/2971/files/conditional_tense_spanish_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5665/0645/files/the_lm_curve_illustrates_that_when_income_increases_the.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0910/0957/files/xaxamujebujotad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7223/3894/files/95930279430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0420/1624/files/what_is_congruent_angles_theorem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5304/6165/files/printable_circle_of_fifths_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3771/5363/files/westlake_county_library_hours.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_off000062af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AF 5556 bytes
SHA-256: 1c1dd09db27fef6f8fbb4fb6699af31d4528d3ca800e52e0ccc74dbf5546302a
font_01_sfnt_off00007573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7573 10716 bytes
SHA-256: a8eb36b4374a558df29c912315fca040f21b630c85de4c3f0b6f7516416048fd