Malicious PDF — malware analysis report

Static analysis result for SHA-256 0460af40b9869f3b…

MALICIOUS

PDF

45.1 KB Created: 2020-08-25 10:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aab4fc7505a797ea0b2c25ec817268a SHA-1: 2949729fb1f78c056aec92a92eb5bcb77fffb8b8 SHA-256: 0460af40b9869f3bc1266117268dfdb6d6803818f1569770339301795c78c5a2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though malformed, contains text related to 'GST tax information' and the embedded URLs, which are likely used as lures for an advance-fee scam.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=gst+tax+information+in+english+pdf
    • http://files.chattanoogabahai.org/uploads/1/3/0/8/130813646/kafaxetanopimu-vunixexiwapem-goleli.pdf
    • http://files.yogachicanada.com/uploads/1/3/0/7/130739155/goxetupireboji.pdf
    • http://files.lubbockchurchofchrist.org/uploads/1/3/0/7/130775309/fugawuz.pdf
    • http://files.maryclaresartwork.com/uploads/1/3/1/3/131378776/b37c620639d0.pdf
    • http://rewizuka.circuitocampoatravesdipgra.com/uploads/1/3/2/7/132740214/degegajegujik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/vuvufiwotirudunoneb.pdf
    • https://cdn.shopify.com/s/files/1/0434/5636/4711/files/jufova.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/5548021999.pdf
    • https://cdn.shopify.com/s/files/1/0454/7844/5206/files/61399948336.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lezoxaxus.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/divokavojawuvexofom.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/pdf_to_ms_word_converter_ocr.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/amazon_business_strategy_2020.pdf
    • https://cdn.shopify.com/s/files/1/0452/0984/5911/files/solid_wood_platform_bed_canada.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/39798940179.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/bikekelek.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9434/files/exame_de_caritipo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071ae.bin
d4aed72213a1a58861ca3ea04fb59dae10847b12b3306095e6f8c1554f1169e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AE 5552 bytes
font_01_sfnt_off0000846b.bin
41ec69d7b90d56cf58479b84281e617f7a47590139693753c1500d745352a967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x846B 10208 bytes

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