Malicious PDF — malware analysis report

Static analysis result for SHA-256 4050a1df53187121…

MALICIOUS

PDF

56.3 KB Created: 2020-08-09 04:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9654044f084fe483c22d858e7e7e9e2 SHA-1: 9cdcd2548d2973e6521ed264d78f5dbfa8355efc SHA-256: 4050a1df531871212b3ea654fa8b4cf2c3cc04390eb7d45b5d589b69fe92ae6f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=regulaciones+aduaneras+cuba+2020+pdf', which is flagged as a malicious redirector. This suggests the PDF is designed to lead users to malicious content through a chain of redirects, likely for phishing or malware distribution.

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.cc/pify?keyword=regulaciones+aduaneras+cuba+2020+pdf
    • http://sividunid.authorajknight.com/uploads/1/3/0/9/130969060/8449727.pdf
    • http://files.lhstv.net/uploads/1/3/1/4/131437363/c9e77c2.pdf
    • http://files.stellasbakery.store/uploads/1/3/1/4/131437515/xofugosig_xilevifilupate.pdf
    • http://razud.mpgseattle.org/uploads/1/3/1/0/131069839/nadifavozoxaz.pdf
    • http://files.theinsuranceguy.agency/uploads/1/3/1/4/131453188/66117001ce.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/zetasodes.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/69014942618.pdf
    • https://cdn.shopify.com/s/files/1/0430/1419/3311/files/xizuzixefumetuzolidevujur.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/polar_and_cartesian_coordinates.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/49527251737.pdf
    • https://cdn.shopify.com/s/files/1/0438/3932/4325/files/incidencia_prevalencia.pdf
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/ma8351_discrete_mathematics_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/dainik_bhaskar_epaper_raipur_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8133/files/mastering_anatomy_and_physiology.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/64389239354.pdf
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/alimentacion_saludable_chile.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009bd8.bin
1e5ef3895798b8a0ac251e4716de4c91d3052dffd167fef6c2fa94abf23b8b78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD8 5744 bytes
font_01_sfnt_off0000af75.bin
aed49edca1c3e826d509fd0c68be3435078c83fe4a3ae6aca8f4f86e6e6cc2ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF75 11056 bytes

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