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) First seen: 2026-05-09
MD5: c0f87329aec284bd9066092e8dab019b SHA-1: facc8a929db50656fc77ab50427dadbe4e8bdc20 SHA-256: 8c945da6a854ce6d124241317d2aefbfadc7d5872d8c35c731e5e9ef021739ac
194 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 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.com/pify?keyword=astral+chronicles+apk+hack In PDF document text
    • http://bened.cosypossum.com.au/uploads/1/3/1/8/131871721/bomitujoxekeboki.pdfIn PDF document text
    • http://jikuf.alphakappawvdkg.com/uploads/1/3/0/7/130775518/a1266ba77830.pdfIn PDF document text
    • http://files.alisonpilkington.com/uploads/1/3/0/7/130776611/abcc7e15a17ec.pdfIn PDF document text
    • http://dofutov.louannbauer.com/uploads/1/3/1/3/131379808/pewajoxune-pasunulezetir-mitetabulizovab-mowubakodipiwe.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/1/0431/1321/8199/files/list_of_high_oxalate_foods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/corn_snake_care_sheet_rspca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/letowopebofowebizuwir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/bowojazepedesawixebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/wovezozawuderar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/dumatadajewitikilovekorew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/adjustment_day_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/sopiwubefakinapezo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F03 3860 bytes
SHA-256: e6966867ac10f7b94eeddf9fab7e3d4de27a77b93d4d19e2a3f5a3ffac1fedad
font_01_sfnt_off00006ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA0 5076 bytes
SHA-256: 40ffb27d025eceda6ee9faa7df60544949b9effcafb3669bf907b36f69fbf609
font_02_sfnt_off00007dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCF 10432 bytes
SHA-256: 6bee590c15343a08197897782a11890f4142d347c1f2c05163dd42fe6570f82f
font_03_sfnt_off0000a199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA199 16160 bytes
SHA-256: 53c3ec829963ec5a0af1bff4be2d724acb9959b277e5253d769434e6be684fe1