Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5577245a93802bd…

MALICIOUS

PDF

48.9 KB Created: 2020-10-15 00:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 54a2d55a08f51fc788c09b7018429a61 SHA-1: fed8ca49ae627fcae87d0d8585a26cde8876d663 SHA-256: b5577245a93802bd7573325b4354bd22a6a4d58a74aa53603caf14c1c4f95f35
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to disposable hosting or redirector services. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Homewell slush maker instructions', directing users to a known malicious redirector. This suggests the document is part of a link farm designed to redirect users to malicious sites, likely for phishing or malware distribution.

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.
  • 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.link/pify?keyword=homewell+slush+maker+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f87690e86152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f871c15aad53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f8769fcdc7a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f87670bc9d82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f876adee0e2e.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/8767144.pdfIn PDF document text
    • https://site-1041937.mozfiles.com/files/1041937/pirijopibojul.pdfIn PDF document text
    • https://site-1043352.mozfiles.com/files/1043352/12358572004.pdfIn PDF document text
    • https://site-1041086.mozfiles.com/files/1041086/24612700519.pdfIn PDF document text
    • https://site-1040171.mozfiles.com/files/1040171/7868401762.pdfIn PDF document text
    • https://site-1040277.mozfiles.com/files/1040277/wifemuzoti.pdfIn PDF document text
    • https://site-1037283.mozfiles.com/files/1037283/45431749654.pdfIn PDF document text
    • https://site-1038506.mozfiles.com/files/1038506/8701277847.pdfIn PDF document text
    • https://site-1043158.mozfiles.com/files/1043158/nunugazoxegunaxoju.pdfIn PDF document text
    • https://site-1039509.mozfiles.com/files/1039509/pumevowo.pdfIn PDF document text
    • https://site-1042584.mozfiles.com/files/1042584/55210939732.pdfIn PDF document text
    • https://site-1037238.mozfiles.com/files/1037238/57803959583.pdfIn PDF document text
    • https://site-1038460.mozfiles.com/files/1038460/34828935908.pdfIn PDF document text
    • https://site-1043855.mozfiles.com/files/1043855/84963472198.pdfIn PDF document text
    • https://site-1044162.mozfiles.com/files/1044162/podefot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b0de0fbf-eaed-42fa-b141-902b8126e468/genuxupimikewej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0df43230-a9fc-4db2-b50f-b107388a1702/91370927632.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7176 5040 bytes
SHA-256: 0b828d3809658f288dce230db493b4a0849e46ac9b9ee5370eee5ad6934c3863
font_01_sfnt_off00008282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8282 11080 bytes
SHA-256: a263a018b4a874ebb00408c1b0c7ad36d94b29b424ced9f42badd67483c3c571
font_02_sfnt_off0000a7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3