Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b67642d3e7dc25c…

MALICIOUS

PDF

42.9 KB Created: 2020-10-26 01:27:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d425be957af2a253a1b2518aa029c3a4 SHA-1: 4f9907ff4ec9548a2b6e5881975679943a31be80 SHA-256: 5b67642d3e7dc25c462d541dff98fcc5d95f51aefb61c3ed3fc69ca978f76590
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm with 30 external PDF links, many hosted on disposable domains, and a primary redirector link to 'ttraff.club'. This indicates a likely attempt to drive traffic to malicious or low-reputation content, disguised as a children's meditation guide. The ML classifier also strongly flagged this PDF as malicious.

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.club/123?keyword=children%2527s+guided+meditation+for+deep+sleep+unicorn In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371814/normal_5f95fd1b6e711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5f8a717f50a90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f9051d80096a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f8742f6cf70f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f873026913e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_5f8bad3e70573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8bc59ca3855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5f95fec9bff28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390329/normal_5f95d51dc7d54.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/mezevoxinokimuwamibu.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/226f5.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://jimagofer.weebly.com/uploads/1/3/0/8/130813953/18bfa8f9f1d.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/965398.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/wuvupawapil.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/1/0488/4080/2469/files/laboratory_machines_and_their_uses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/wusorizubizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9462/9270/files/43259507400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3840/6806/files/isekai_seikishi_monogatari_episode_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7769/0035/files/wallpaper_nature_hd_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2949/8522/files/poluronedukapomagamal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2103/6452/files/myofascial_trigger_point.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_off00006857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6857 5508 bytes
SHA-256: 74fb016e7e4db370cc85afa4d30f7b983b146a1c74c9261a92868087cd02ad26
font_01_sfnt_off00007ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE6 10212 bytes
SHA-256: 4f670559d8e3b0e283bd4ddd37f61798b11dd8f54d53f937a35326333b21add5