Malicious PDF — malware analysis report

Static analysis result for SHA-256 1219e9ad3a53d18f…

MALICIOUS

PDF

50.3 KB Created: 2020-09-17 10:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf36b32b54cce3b8fe3b8c037426ce03 SHA-1: a524ec2a569f284e50273065bfb4a010e77f590c SHA-256: 1219e9ad3a53d18f53be9c399064fd21e89074879d060e660d78e3d2bc060ac7
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to look like a product manual search. The ML classifier strongly indicates maliciousness. The presence of numerous external PDF links, many pointing to Shopify, suggests an attempt to create a link farm or distribute further malicious content disguised as legitimate documents.

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.me/wix?keyword=shark+steam+mop+manual+s3501
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1762/3959/files/lufamazo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/fipegisiferagos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8243/2160/files/totezotal.pdf
    • https://edbc9df4-952f-4db8-991a-01cddde1969f.filesusr.com/ugd/b444d4_aa79b1c0a86e4a2eb29894ba4d54ee46.pdf?index=true
    • https://b2ef110c-aff3-4f0f-80f2-b713521485c9.filesusr.com/ugd/d13e1f_2456aef08f6843629da262bb2a6a6e7c.pdf?index=true
    • https://780b72ec-f341-45b6-ab43-dbcc8a884cff.filesusr.com/ugd/10b11f_2567970d275144bda268cd65245777b6.pdf?index=true
    • https://573ec206-dec0-40a4-8cb9-c938c59f4096.filesusr.com/ugd/accd1f_5136b0bacddd4abcb2d5ee580bf7c734.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/6849/7823/files/95500082271.pdf
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/nekekoturota.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/22174820421.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/rixozegenir.pdf
    • https://019c363d-a6cd-432c-82c3-de28e6df75cf.filesusr.com/ugd/6c032c_7bb77cf6d1a64912a8e86091898a64fc.pdf?index=true
    • https://0df16159-673c-43e4-b465-462b8d9c95ad.filesusr.com/ugd/1be480_4f2a1122e7684525ba9e90f2fb322b0b.pdf?index=true
    • https://92a9b462-e1a8-4868-a8ff-4e280f012eec.filesusr.com/ugd/87fdc7_5cfbc1d976af446aab681f1f79027024.pdf?index=true
    • https://28b3a215-d87d-4d97-ac51-677d86046527.filesusr.com/ugd/83e584_af976b394ed64068abb9a89a2fe9c20f.pdf?index=true
    • https://e3cc073a-d90b-419d-8b65-9e6c19d768bf.filesusr.com/ugd/77941b_fc296363012f436e88041d4351c477bb.pdf?index=true
    • 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_off0000840b.bin
6feddc15daf8ba40e8a80ad4ae247fc58fcd29dc7521d8ba129ed402b5a14711		 pdf-font-stream PDF embedded font (sfnt) at offset 0x840B 5708 bytes
font_01_sfnt_off0000974f.bin
373f800e500e673bf69423a31ae822c060df49b66c1388b3fb240f85777fb3d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x974F 10952 bytes

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