Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ab52ada88e2314…

MALICIOUS

PDF

51.7 KB Created: 2020-08-20 20:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2be33d859b91028ddecaf75c3b21b9e2 SHA-1: ce741b64c22b2b77b955624d2e19e56f8398aa1a SHA-256: 95ab52ada88e23142a7cd6b859f2be5f1995606365ea32372d596f11ee94a759
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links pointing to various PDF files hosted on Shopify, indicative of a link farm. One of the primary links directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to manipulate search results or distribute further malicious content, potentially as part of a SEO poisoning or phishing campaign.

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.ru/pify?keyword=alphagan+p+dosage+information
    • http://jatul.leohwang.com/uploads/1/3/0/8/130874232/lexov_sizuwanum_japowe.pdf
    • http://rasemos.cottonhouseinteriors.co.uk/uploads/1/3/1/6/131606620/kolexa.pdf
    • http://files.crookeddoorstudio.net/uploads/1/3/1/3/131379591/b5173181.pdf
    • http://dizuluw.bzzzybitez.com/uploads/1/3/2/8/132814930/3025066.pdf
    • http://sesonu.lakesareaminiatureherefords.com/uploads/1/3/1/0/131071021/6592864.pdf
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/38541312004.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/musica_mexicana_para_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/jozovalufiwo.pdf
    • https://cdn.shopify.com/s/files/1/0448/2046/3778/files/body_language_in_the_workplace_pease.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/gluten_free_barcode_scanner_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/3323/9457/files/standard_deduction_worksheet_for_dependents_irs.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/32733729529.pdf
    • https://cdn.shopify.com/s/files/1/0428/7728/8611/files/career_counseling_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zilifevuzumojewod.pdf
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/sample_brochure_design_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/6343/5679/files/tomixusuvat.pdf
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/rutilugexura.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d8b.bin
7d9eae739cc09ec3153215b7fda1d12247eac5d045c74b0bbdfc515c37b75a80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8B 5232 bytes
font_01_sfnt_off00008f1f.bin
6c499ffeec927b6eb2c939072a70d9a1a865e88e08486ac1da3d0dff541d7ba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1F 11580 bytes
font_02_sfnt_off0000b3bb.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BB 4324 bytes

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