Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c3d6ada812801e…

MALICIOUS

PDF

45.1 KB Created: 2020-10-26 07:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: aac7610d3ae9a4a31825ec5fde8cdbeb SHA-1: 82c2d1a2a83c6191f9068047668d4db2440c2a73 SHA-256: 14c3d6ada812801e01110c6e42897e87ab87b109b7b245f58d6bee973e31b651
194 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 redirector domains and link farms, indicating a malicious intent to distribute further payloads or conduct phishing. The ML classifier strongly flagged this PDF as malicious. The embedded URLs, such as 'https://ttraff.cc/123?keyword=define+mental+illness+pdf', are indicative of a phishing or malware distribution campaign.

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.cc/123?keyword=define+mental+illness+pdf In PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/suwixumerudivoz.pdfIn PDF document text
    • https://jozokuxig.weebly.com/uploads/1/3/2/8/132814463/zojin.pdfIn PDF document text
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/9497816.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lukuxaluk.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/xezomomob-sesuwuriz-judesopagu.pdfIn PDF document text
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/499725.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/nulemuk.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7885719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f88aa7ccc0d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f87c66a1b751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f8be3798af4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_5f92093215b37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5f8b9e74e06f4.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/1/0485/9153/6288/files/77449877796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6487/5925/files/jopupizovup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8024/5950/files/79056496956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/poemas_de_la_vida_cortos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9155/6031/files/settings_fragment_android_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/kofomimebijumo.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/51680960781.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/gutogakur.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/88226628705.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_off00007241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7241 5088 bytes
SHA-256: aa9a391eb45cc537b560c73ce8193b63acc7915ba2e41c31ae6c4a23d46136bb
font_01_sfnt_off00008383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8383 10284 bytes
SHA-256: c934a0df8f8d159b2c617320dd28e1d690ad31ffbf5b3e007ea4841ddab27fc9