Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46755e39e2f943c…

MALICIOUS

PDF

47.8 KB Created: 2020-10-03 18:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2759c819205419ad84cfac9047c82a0d SHA-1: 53cad07359d02b4272c02dc7d9d0bad4a700131e SHA-256: c46755e39e2f943ce1ca27a8761479b548a7e2854e9f64ccd784e42f3bc0d956
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Belajar bahasa jepang dasar untuk pemula pdf' and the malicious URL, suggesting a lure to a malicious site disguised as a learning resource. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful content.

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://gettraff.ru/strik?keyword=belajar+bahasa+jepang+dasar+untuk+pemula+pdf In PDF document text
    • http://files.dabasocommunityunit.com/uploads/1/3/1/3/131380263/tupisanuzirax.pdfIn PDF document text
    • http://fiwevuga.braydenyork.com/uploads/1/3/0/8/130874493/zozuwekefe_ragolalelu.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/1/0428/2961/1171/files/avent_manual_breast_pump_how_to_use.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1499/9197/files/miburopezabopop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7000/8727/files/48379353373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/where_do_i_belong_in_the_world.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/94537286053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c5cbfd-6d39-4dbc-b5c3-5bdfd5ef783b/kewezamotapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be33e30-a962-41c8-a9f8-829ac38e57ad/16745055846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a2c6283-c465-43f5-b169-2b97bd3d55ed/gatimidovorude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/newsela_the_holocaust_part_two_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9695/1969/files/the_eczema_diet_karen_fischer_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/27796866270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7589/4422/files/zafekasekavuvuwivologiba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6A 5352 bytes
SHA-256: 54ce91f31d70b6c71e6554b4c7981bd8a0ce83e2d9261776fad39b079dfd35d2
font_01_sfnt_off00007227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7227 5784 bytes
SHA-256: 82f434a10a2487edead0b266751fb2bd592f7ee8fa9169dd75fec3bf1e6730a1
font_02_sfnt_off000085af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AF 14124 bytes
SHA-256: 6014faf2ef9aa6900ff67ef91e7a7ad5427421465480baa511e30083d4c4ae19

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