Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c945da6a854ce6d…

MALICIOUS

PDF

49.0 KB Created: 2020-08-17 07:39:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0f87329aec284bd9066092e8dab019b SHA-1: facc8a929db50656fc77ab50427dadbe4e8bdc20 SHA-256: 8c945da6a854ce6d124241317d2aefbfadc7d5872d8c35c731e5e9ef021739ac
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body text, though heavily corrupted, contains the string 'Astral chronicles apk hack' and a URL that appears to be the primary malicious redirector. The presence of numerous PDF links suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=astral+chronicles+apk+hack
    • http://bened.cosypossum.com.au/uploads/1/3/1/8/131871721/bomitujoxekeboki.pdf
    • http://jikuf.alphakappawvdkg.com/uploads/1/3/0/7/130775518/a1266ba77830.pdf
    • http://files.alisonpilkington.com/uploads/1/3/0/7/130776611/abcc7e15a17ec.pdf
    • http://dofutov.louannbauer.com/uploads/1/3/1/3/131379808/pewajoxune-pasunulezetir-mitetabulizovab-mowubakodipiwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8199/files/list_of_high_oxalate_foods.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/corn_snake_care_sheet_rspca.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/letowopebofowebizuwir.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/bowojazepedesawixebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/wovezozawuderar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/dumatadajewitikilovekorew.pdf
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/adjustment_day_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/sopiwubefakinapezo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f03.bin
e6966867ac10f7b94eeddf9fab7e3d4de27a77b93d4d19e2a3f5a3ffac1fedad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F03 3860 bytes
font_01_sfnt_off00006ca0.bin
40ffb27d025eceda6ee9faa7df60544949b9effcafb3669bf907b36f69fbf609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA0 5076 bytes
font_02_sfnt_off00007dcf.bin
6bee590c15343a08197897782a11890f4142d347c1f2c05163dd42fe6570f82f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCF 10432 bytes
font_03_sfnt_off0000a199.bin
53c3ec829963ec5a0af1bff4be2d724acb9959b277e5253d769434e6be684fe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA199 16160 bytes

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