Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f0eaf6587a5313…

MALICIOUS

PDF

72.9 KB Created: 2020-08-11 20:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49d588b465bb76059820c35d4a7b9809 SHA-1: 51354d718d87018a1a1efaeee88ff811092fb772 SHA-256: 76f0eaf6587a5313867418f9defa2bdf69e911ddb629883db54a90d8f6235f61
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a link farm designed for SEO manipulation. One prominent link leads to a redirector infrastructure known for malicious activity. The document body, though heavily obfuscated, contains text related to 'Schneider electric product catalogue pdf', suggesting a lure to disguise the malicious intent of the embedded links.

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/pify?keyword=schneider+electric+product+catalogue+pdf
    • http://files.baremedispa.com/uploads/1/3/1/3/131382092/5877821.pdf
    • http://xitesu.runbikechaleur.ca/uploads/1/3/0/8/130813747/abbb030c.pdf
    • http://files.schnauzersetc.net/uploads/1/3/0/7/130739116/4297413.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6522/1028/files/jasaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/signs_and_symptoms_of_tuberculosis.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/1023712462.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/8997/files/jorikozi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6731/files/antipsychotic_drugs_pharmacology.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/zotunovenixi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5135/files/sapatutosifokiwatop.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/favogupavik.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/fokozalufidevofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1081/8201/files/epigenetic_principles_of_evolution.pdf
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/49467441675.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_off0000d620.bin
292ac919eb7bec1b223e0cfda350f36e526623ae3ba0e3ef0b2a8e8536a4708b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD620 5340 bytes
font_01_sfnt_off0000e837.bin
dfb76186a3ad1d86cb636d3d7866572d4f870168e746bda82e1453f39211730d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE837 15000 bytes