Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93450aa7052ff02…

MALICIOUS

PDF

43.4 KB Created: 2020-10-15 06:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d6fe7086d742906fae145803884fcae2 SHA-1: 7fd5335bc22f5a7b025e5594a4f5ebd0ead2fbae SHA-256: f93450aa7052ff027b05da71b0a5333a96525a8816763f80f7e94a809a62b09e
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.cc. This redirector is likely used to obscure the final destination and distribute malicious content or phishing pages. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful sites.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=hangouts+chat+app+for+android In PDF document text
    • https://site-1043937.mozfiles.com/files/1043937/provises_ativos_e_passivos_contingentes.pdfIn PDF document text
    • https://site-1042883.mozfiles.com/files/1042883/39236361285.pdfIn PDF document text
    • https://site-1039329.mozfiles.com/files/1039329/42619813433.pdfIn PDF document text
    • https://site-1040056.mozfiles.com/files/1040056/90155477865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f87a975f322f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f8783536167b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f96cd4331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f87678db6fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f870280a399a.pdfIn PDF document text
    • https://site-1038985.mozfiles.com/files/1038985/38658004602.pdfIn PDF document text
    • https://site-1039424.mozfiles.com/files/1039424/82405392478.pdfIn PDF document text
    • https://site-1039576.mozfiles.com/files/1039576/muvexodafaw.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/1/0481/2475/6121/files/17_year_anniversary_gift_for_her.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/what_does_coconut_kefir_taste_like.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9919/8118/files/xoxezaguwugajebujiwujepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/lesnar_vs_velasquez_wwe_full_match.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0777/7189/files/17020734011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8170b903-aed9-49c2-bb29-a787d8739257/viwoxumataterinoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd67e00d-766c-4e22-9371-5884322c45e3/91491132952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd1b1c9-2bbe-4cfe-9b72-e04ff83466b9/zusebikokesanezope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfadf8ff-6e91-4fd8-9d2e-69ecdee78c62/vamomowejexixozinubamot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e385a7a1-1095-42d5-96cc-c093621d4131/11167499985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c1e688c-079e-4862-97d3-55e7fb7225f9/wamarusudekuwosujoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe9c48f-5b32-4c98-a50f-89239543aa02/nufoduvutelukizitanusate.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_off00006c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C23 5344 bytes
SHA-256: 8d03629218557b0054d882864bf779b011c5c433295a6cfe303d7e6b53263c5b
font_01_sfnt_off00007e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E45 9964 bytes
SHA-256: cfd4bc722c308c483224fd8cba4ec2b3168cc4fec7ff674abe0527894fda91a4