Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0277f55693034db…

MALICIOUS

PDF

65.6 KB Created: 2020-11-03 01:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 890865b4b5b17113dad8c3b276e1a5e4 SHA-1: 2fbd6c2a4dc1feb6d7bcd97f2762e3f261bac08c SHA-256: d0277f55693034db89a4ecfe336aa443f122fb9cf68c3755fd3ea5c2209150f5
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.club/123?keyword=cci+fascard+reviews'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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://ttraff.club/123?keyword=cci+fascard+reviews
    • https://cdn-cms.f-static.net/uploads/4384048/normal_5f911d8395510.pdf
    • https://vimadefivikimaw.weebly.com/uploads/1/3/4/2/134265378/zomewamisodi.pdf
    • https://cdn-cms.f-static.net/uploads/4422643/normal_5f99c4dd3b24b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0497/9834/8963/files/81889369715.pdf
    • https://cdn.shopify.com/s/files/1/0501/7255/9550/files/apollo_13_strain_thc_content.pdf
    • https://cdn.shopify.com/s/files/1/0485/7797/0341/files/zagukogulamagajisojodale.pdf
    • https://cdn.shopify.com/s/files/1/0505/0397/5098/files/62328364371.pdf
    • https://s3.amazonaws.com/bupijila/safe_room_doors_australia.pdf
    • https://uploads.strikinglycdn.com/files/d23f1930-ff97-4917-b4e8-e5cd6bd554eb/32419082740.pdf
    • https://s3.amazonaws.com/fizup/31973938981.pdf
    • https://uploads.strikinglycdn.com/files/577ae809-e6eb-4fd8-8ba1-4284946e53ea/saborariruxo.pdf
    • https://cdn.shopify.com/s/files/1/0467/7727/0425/files/factores_sociales_y_economicos.pdf
    • https://cdn.shopify.com/s/files/1/0468/8606/0189/files/skam_france_cast_season_3.pdf
    • https://uploads.strikinglycdn.com/files/5b705175-5e6d-4737-b108-2e00eccad5ab/72150573097.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c179.bin
205ee6873eea4f7a702f9ed439e36242b3d7a6a11211e4a077b972a1f6c26aa1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC179 5040 bytes
font_01_sfnt_off0000d2c0.bin
fc10517e70a2c124c9bb9856d4405dcdfd039a7134762b658adf3abe313c434f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C0 11612 bytes