Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc2e9bf3b17471e…

MALICIOUS

PDF

50.1 KB Created: 2020-07-25 08:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9546293b331c002bf5db0a2f065aa37c SHA-1: b6813750c941b14f7e66084529dfd8d1a7663755 SHA-256: 7dc2e9bf3b17471e4ae18aae86d32f521313d4074b0c92b51e68536847eb3637
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Ampalaya planting guide pdf', suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely for SEO spam or phishing campaigns.

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.ru/wb?keyword=ampalaya%20planting%20guide%20pdf
    • http://files.mathlandinc.com/uploads/1/3/2/6/132696233/1035132.pdf
    • http://files.darrenleesonpics.co.uk/uploads/1/3/2/7/132712514/6075441.pdf
    • http://files.carnegieinvest.com/uploads/1/3/2/3/132303359/womes.pdf
    • http://files.factsorfictions.com/uploads/1/3/0/7/130775516/da831205d35.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/20935682925.pdf
    • https://cdn.shopify.com/s/files/1/0437/7765/4942/files/58054029414.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/zaraburikepazemon.pdf
    • https://cdn.shopify.com/s/files/1/0431/9716/9824/files/60916242351.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/rotojujebifipon.pdf
    • https://cdn.shopify.com/s/files/1/0435/2324/4191/files/gusogokob.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/51545887187.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0032/files/figoxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/moliv.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1338/files/kedegetabifuno.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_off0000885a.bin
3d745821ab35b028d4d01d667ad2f4353c294e438db2575167673edddade64fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x885A 4952 bytes
font_01_sfnt_off00009924.bin
2e2f23d7a295d803ff3581bdd5456dc4bb1b7ebc84269ea64238694430c5242a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9924 10040 bytes