Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4befab9f132e4ab…

MALICIOUS

PDF

34.9 KB Created: 2020-10-16 03:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fb2cdc1824500338ce6f0df81db2a020 SHA-1: eee17046f271f9150bf276d4a02842c5337ce530 SHA-256: b4befab9f132e4abc92fded980f853bda91c32cb6c24a7312dcd7acee16e4ec7
154 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, ggtraff.ru, which is likely used to distribute further malicious content. The document also features a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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 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.
  • 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://ggtraff.ru/pify?keyword=l-call+-+lollipop+call+style+apk In PDF document text
    • https://site-1041770.mozfiles.com/files/1041770/fijazujuzafik.pdfIn PDF document text
    • https://site-1039834.mozfiles.com/files/1039834/49964371227.pdfIn PDF document text
    • https://site-1039924.mozfiles.com/files/1039924/lerapivag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f88397487dbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f88742e62907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5f889e7f55204.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8925184.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/813cf1644869f.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/kazukumupupafo.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • https://site-1039279.mozfiles.com/files/1039279/38793200244.pdfIn PDF document text
    • https://site-1040322.mozfiles.com/files/1040322/58516488298.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/1/0433/9820/1502/files/54510721590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9843/1381/files/male_to_male_extension_cord_dangerous.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2782/3264/files/superwinch_terra_45_vs_warn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1722/8455/files/26503947448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/genital_herpes_in_pregnancy_nice_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3499/9446/files/imdb_parents_guide_aladdin_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7790/4800/files/best_guns_in_pubg_mobile_season_13.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5251/7534/files/william_blake_poems_proverbs_of_hell.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_off00004be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE1 4972 bytes
SHA-256: 9754ca559d4594093cb5f4550e72e6dff689e3f5b7c144eb7705c45513d95e52
font_01_sfnt_off00005ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE9 9780 bytes
SHA-256: e08389c2e4420ed9dd4e81823e81b1d402f4d53c37e8789335022c343275d3ab

Open this report in the interactive analyzer, or submit your own file for analysis.