Malicious PDF — malware analysis report

Static analysis result for SHA-256 b08da0f18f6afb45…

MALICIOUS

PDF

41.3 KB Created: 2020-08-22 04:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8fa734ce5af8e76717e898b815ada66 SHA-1: e0358b4abc6db590bd5fcc0bac157f58927a0a34 SHA-256: b08da0f18f6afb45fba373e69236d5810bfed9b4eabe8c47e244d78c513d36ba
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body mentions 'Google translate ios app', likely a lure to entice users to click the malicious link. The presence of a link farm and a critical redirector heuristic strongly suggests a phishing or redirection attack. No scripts were extracted, limiting the analysis of further execution chains.

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.com/pify?keyword=google+translate+ios+app
    • http://xakilola.westsoundartandmusic.org/uploads/1/3/1/4/131407408/3b1b4846a3c66b.pdf
    • http://files.centrelinedesigns.co.uk/uploads/1/3/1/8/131856919/gofitubigop.pdf
    • http://files.kofc4057.org/uploads/1/3/1/6/131606733/83a67cc15.pdf
    • http://duribin.sarahelizabethhealthfitness.com/uploads/1/3/2/6/132682787/4e61121.pdf
    • http://files.gammaxiques.org/uploads/1/3/0/9/130969573/9396082.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/46321670591.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/47475039241.pdf
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/aikido_wrist_lock_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/77915759851.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/waiting_for_table_metadata_lock.pdf
    • https://cdn.shopify.com/s/files/1/0432/8466/0380/files/32414627406.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/sedumumosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/kenumidoludowizavujape.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7283/files/jivukuloba.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/70561789191.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_off0000631c.bin
175af0cb553ae2a7e08900e4cdbfad99ca46f73013601f2a0d3d46da2f547e42
pdf-font-stream PDF embedded font (sfnt) at offset 0x631C 5020 bytes
font_01_sfnt_off00007443.bin
238a72bec282f0ed86d4b1daface1ed485eb59e1908876a62c7a79ee770cd37a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7443 10572 bytes